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prototype.js (139854B)

---

 /*  Prototype JavaScript framework, version 1.6.1
  *  (c) 2005-2009 Sam Stephenson
  *
  *  Prototype is freely distributable under the terms of an MIT-style license.
  *  For details, see the Prototype web site: http://www.prototypejs.org/
  *
  *--------------------------------------------------------------------------*/
 
 var Prototype = {
   Version: '1.6.1',
 
   Browser: (function(){
     var ua = navigator.userAgent;
     var isOpera = Object.prototype.toString.call(window.opera) == '[object Opera]';
     return {
       IE:             !!window.attachEvent && !isOpera,
       Opera:          isOpera,
       WebKit:         ua.indexOf('AppleWebKit/') > -1,
       Gecko:          ua.indexOf('Gecko') > -1 && ua.indexOf('KHTML') === -1,
       MobileSafari:   /Apple.*Mobile.*Safari/.test(ua)
     }
   })(),
 
   BrowserFeatures: {
     XPath: !!document.evaluate,
     SelectorsAPI: !!document.querySelector,
     ElementExtensions: (function() {
       var constructor = window.Element || window.HTMLElement;
       return !!(constructor && constructor.prototype);
     })(),
     SpecificElementExtensions: (function() {
       if (typeof window.HTMLDivElement !== 'undefined')
         return true;
 
       var div = document.createElement('div');
       var form = document.createElement('form');
       var isSupported = false;
 
       if (div['__proto__'] && (div['__proto__'] !== form['__proto__'])) {
         isSupported = true;
       }
 
       div = form = null;
 
       return isSupported;
     })()
   },
 
   ScriptFragment: '<script[^>]*>([\\S\\s]*?)<\/script>',
   JSONFilter: /^\/\*-secure-([\s\S]*)\*\/\s*$/,
 
   emptyFunction: function() { },
   K: function(x) { return x }
 };
 
 if (Prototype.Browser.MobileSafari)
   Prototype.BrowserFeatures.SpecificElementExtensions = false;
 
 
 var Abstract = { };
 
 
 var Try = {
   these: function() {
     var returnValue;
 
     for (var i = 0, length = arguments.length; i < length; i++) {
       var lambda = arguments[i];
       try {
         returnValue = lambda();
         break;
       } catch (e) { }
     }
 
     return returnValue;
   }
 };
 
 /* Based on Alex Arnell's inheritance implementation. */
 
 var Class = (function() {
   function subclass() {};
   function create() {
     var parent = null, properties = $A(arguments);
     if (Object.isFunction(properties[0]))
       parent = properties.shift();
 
     function klass() {
       this.initialize.apply(this, arguments);
     }
 
     Object.extend(klass, Class.Methods);
     klass.superclass = parent;
     klass.subclasses = [];
 
     if (parent) {
       subclass.prototype = parent.prototype;
       klass.prototype = new subclass;
       parent.subclasses.push(klass);
     }
 
     for (var i = 0; i < properties.length; i++)
       klass.addMethods(properties[i]);
 
     if (!klass.prototype.initialize)
       klass.prototype.initialize = Prototype.emptyFunction;
 
     klass.prototype.constructor = klass;
     return klass;
   }
 
   function addMethods(source) {
     var ancestor   = this.superclass && this.superclass.prototype;
     var properties = Object.keys(source);
 
     if (!Object.keys({ toString: true }).length) {
       if (source.toString != Object.prototype.toString)
         properties.push("toString");
       if (source.valueOf != Object.prototype.valueOf)
         properties.push("valueOf");
     }
 
     for (var i = 0, length = properties.length; i < length; i++) {
       var property = properties[i], value = source[property];
       if (ancestor && Object.isFunction(value) &&
           value.argumentNames().first() == "$super") {
         var method = value;
         value = (function(m) {
           return function() { return ancestor[m].apply(this, arguments); };
         })(property).wrap(method);
 
         value.valueOf = method.valueOf.bind(method);
         value.toString = method.toString.bind(method);
       }
       this.prototype[property] = value;
     }
 
     return this;
   }
 
   return {
     create: create,
     Methods: {
       addMethods: addMethods
     }
   };
 })();
 (function() {
 
   var _toString = Object.prototype.toString;
 
   function extend(destination, source) {
     for (var property in source)
       destination[property] = source[property];
     return destination;
   }
 
   function inspect(object) {
     try {
       if (isUndefined(object)) return 'undefined';
       if (object === null) return 'null';
       return object.inspect ? object.inspect() : String(object);
     } catch (e) {
       if (e instanceof RangeError) return '...';
       throw e;
     }
   }
 
   function toJSON(object) {
     var type = typeof object;
     switch (type) {
       case 'undefined':
       case 'function':
       case 'unknown': return;
       case 'boolean': return object.toString();
     }
 
     if (object === null) return 'null';
     if (object.toJSON) return object.toJSON();
     if (isElement(object)) return;
 
     var results = [];
     for (var property in object) {
       var value = toJSON(object[property]);
       if (!isUndefined(value))
         results.push(property.toJSON() + ': ' + value);
     }
 
     return '{' + results.join(', ') + '}';
   }
 
   function toQueryString(object) {
     return $H(object).toQueryString();
   }
 
   function toHTML(object) {
     return object && object.toHTML ? object.toHTML() : String.interpret(object);
   }
 
   function keys(object) {
     var results = [];
     for (var property in object)
       results.push(property);
     return results;
   }
 
   function values(object) {
     var results = [];
     for (var property in object)
       results.push(object[property]);
     return results;
   }
 
   function clone(object) {
     return extend({ }, object);
   }
 
   function isElement(object) {
     return !!(object && object.nodeType == 1);
   }
 
   function isArray(object) {
     return _toString.call(object) == "[object Array]";
   }
 
 
   function isHash(object) {
     return object instanceof Hash;
   }
 
   function isFunction(object) {
     return typeof object === "function";
   }
 
   function isString(object) {
     return _toString.call(object) == "[object String]";
   }
 
   function isNumber(object) {
     return _toString.call(object) == "[object Number]";
   }
 
   function isUndefined(object) {
     return typeof object === "undefined";
   }
 
   extend(Object, {
     extend:        extend,
     inspect:       inspect,
     toJSON:        toJSON,
     toQueryString: toQueryString,
     toHTML:        toHTML,
     keys:          keys,
     values:        values,
     clone:         clone,
     isElement:     isElement,
     isArray:       isArray,
     isHash:        isHash,
     isFunction:    isFunction,
     isString:      isString,
     isNumber:      isNumber,
     isUndefined:   isUndefined
   });
 })();
 Object.extend(Function.prototype, (function() {
   var slice = Array.prototype.slice;
 
   function update(array, args) {
     var arrayLength = array.length, length = args.length;
     while (length--) array[arrayLength + length] = args[length];
     return array;
   }
 
   function merge(array, args) {
     array = slice.call(array, 0);
     return update(array, args);
   }
 
   function argumentNames() {
     var names = this.toString().match(/^[\s\(]*function[^(]*\(([^)]*)\)/)[1]
       .replace(/\/\/.*?[\r\n]|\/\*(?:.|[\r\n])*?\*\//g, '')
       .replace(/\s+/g, '').split(',');
     return names.length == 1 && !names[0] ? [] : names;
   }
 
   function bind(context) {
     if (arguments.length < 2 && Object.isUndefined(arguments[0])) return this;
     var __method = this, args = slice.call(arguments, 1);
     return function() {
       var a = merge(args, arguments);
       return __method.apply(context, a);
     }
   }
 
   function bindAsEventListener(context) {
     var __method = this, args = slice.call(arguments, 1);
     return function(event) {
       var a = update([event || window.event], args);
       return __method.apply(context, a);
     }
   }
 
   function curry() {
     if (!arguments.length) return this;
     var __method = this, args = slice.call(arguments, 0);
     return function() {
       var a = merge(args, arguments);
       return __method.apply(this, a);
     }
   }
 
   function delay(timeout) {
     var __method = this, args = slice.call(arguments, 1);
     timeout = timeout * 1000
     return window.setTimeout(function() {
       return __method.apply(__method, args);
     }, timeout);
   }
 
   function defer() {
     var args = update([0.01], arguments);
     return this.delay.apply(this, args);
   }
 
   function wrap(wrapper) {
     var __method = this;
     return function() {
       var a = update([__method.bind(this)], arguments);
       return wrapper.apply(this, a);
     }
   }
 
   function methodize() {
     if (this._methodized) return this._methodized;
     var __method = this;
     return this._methodized = function() {
       var a = update([this], arguments);
       return __method.apply(null, a);
     };
   }
 
   return {
     argumentNames:       argumentNames,
     bind:                bind,
     bindAsEventListener: bindAsEventListener,
     curry:               curry,
     delay:               delay,
     defer:               defer,
     wrap:                wrap,
     methodize:           methodize
   }
 })());
 
 
 Date.prototype.toJSON = function() {
   return '"' + this.getUTCFullYear() + '-' +
     (this.getUTCMonth() + 1).toPaddedString(2) + '-' +
     this.getUTCDate().toPaddedString(2) + 'T' +
     this.getUTCHours().toPaddedString(2) + ':' +
     this.getUTCMinutes().toPaddedString(2) + ':' +
     this.getUTCSeconds().toPaddedString(2) + 'Z"';
 };
 
 
 RegExp.prototype.match = RegExp.prototype.test;
 
 RegExp.escape = function(str) {
   return String(str).replace(/([.*+?^=!:${}()|[\]\/\\])/g, '\\$1');
 };
 var PeriodicalExecuter = Class.create({
   initialize: function(callback, frequency) {
     this.callback = callback;
     this.frequency = frequency;
     this.currentlyExecuting = false;
 
     this.registerCallback();
   },
 
   registerCallback: function() {
     this.timer = setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
   },
 
   execute: function() {
     this.callback(this);
   },
 
   stop: function() {
     if (!this.timer) return;
     clearInterval(this.timer);
     this.timer = null;
   },
 
   onTimerEvent: function() {
     if (!this.currentlyExecuting) {
       try {
         this.currentlyExecuting = true;
         this.execute();
         this.currentlyExecuting = false;
       } catch(e) {
         this.currentlyExecuting = false;
         throw e;
       }
     }
   }
 });
 Object.extend(String, {
   interpret: function(value) {
     return value == null ? '' : String(value);
   },
   specialChar: {
     '\b': '\\b',
     '\t': '\\t',
     '\n': '\\n',
     '\f': '\\f',
     '\r': '\\r',
     '\\': '\\\\'
   }
 });
 
 Object.extend(String.prototype, (function() {
 
   function prepareReplacement(replacement) {
     if (Object.isFunction(replacement)) return replacement;
     var template = new Template(replacement);
     return function(match) { return template.evaluate(match) };
   }
 
   function gsub(pattern, replacement) {
     var result = '', source = this, match;
     replacement = prepareReplacement(replacement);
 
     if (Object.isString(pattern))
       pattern = RegExp.escape(pattern);
 
     if (!(pattern.length || pattern.source)) {
       replacement = replacement('');
       return replacement + source.split('').join(replacement) + replacement;
     }
 
     while (source.length > 0) {
       if (match = source.match(pattern)) {
         result += source.slice(0, match.index);
         result += String.interpret(replacement(match));
         source  = source.slice(match.index + match[0].length);
       } else {
         result += source, source = '';
       }
     }
     return result;
   }
 
   function sub(pattern, replacement, count) {
     replacement = prepareReplacement(replacement);
     count = Object.isUndefined(count) ? 1 : count;
 
     return this.gsub(pattern, function(match) {
       if (--count < 0) return match[0];
       return replacement(match);
     });
   }
 
   function scan(pattern, iterator) {
     this.gsub(pattern, iterator);
     return String(this);
   }
 
   function truncate(length, truncation) {
     length = length || 30;
     truncation = Object.isUndefined(truncation) ? '...' : truncation;
     return this.length > length ?
       this.slice(0, length - truncation.length) + truncation : String(this);
   }
 
   function strip() {
     return this.replace(/^\s+/, '').replace(/\s+$/, '');
   }
 
   function stripTags() {
     return this.replace(/<\w+(\s+("[^"]*"|'[^']*'|[^>])+)?>|<\/\w+>/gi, '');
   }
 
   function stripScripts() {
     return this.replace(new RegExp(Prototype.ScriptFragment, 'img'), '');
   }
 
   function extractScripts() {
     var matchAll = new RegExp(Prototype.ScriptFragment, 'img');
     var matchOne = new RegExp(Prototype.ScriptFragment, 'im');
     return (this.match(matchAll) || []).map(function(scriptTag) {
       return (scriptTag.match(matchOne) || ['', ''])[1];
     });
   }
 
   function evalScripts() {
     return this.extractScripts().map(function(script) { return eval(script) });
   }
 
   function escapeHTML() {
     return this.replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');
   }
 
   function unescapeHTML() {
     return this.stripTags().replace(/&lt;/g,'<').replace(/&gt;/g,'>').replace(/&amp;/g,'&');
   }
 
 
   function toQueryParams(separator) {
     var match = this.strip().match(/([^?#]*)(#.*)?$/);
     if (!match) return { };
 
     return match[1].split(separator || '&').inject({ }, function(hash, pair) {
       if ((pair = pair.split('='))[0]) {
         var key = decodeURIComponent(pair.shift());
         var value = pair.length > 1 ? pair.join('=') : pair[0];
         if (value != undefined) value = decodeURIComponent(value);
 
         if (key in hash) {
           if (!Object.isArray(hash[key])) hash[key] = [hash[key]];
           hash[key].push(value);
         }
         else hash[key] = value;
       }
       return hash;
     });
   }
 
   function toArray() {
     return this.split('');
   }
 
   function succ() {
     return this.slice(0, this.length - 1) +
       String.fromCharCode(this.charCodeAt(this.length - 1) + 1);
   }
 
   function times(count) {
     return count < 1 ? '' : new Array(count + 1).join(this);
   }
 
   function camelize() {
     var parts = this.split('-'), len = parts.length;
     if (len == 1) return parts[0];
 
     var camelized = this.charAt(0) == '-'
       ? parts[0].charAt(0).toUpperCase() + parts[0].substring(1)
       : parts[0];
 
     for (var i = 1; i < len; i++)
       camelized += parts[i].charAt(0).toUpperCase() + parts[i].substring(1);
 
     return camelized;
   }
 
   function capitalize() {
     return this.charAt(0).toUpperCase() + this.substring(1).toLowerCase();
   }
 
   function underscore() {
     return this.replace(/::/g, '/')
                .replace(/([A-Z]+)([A-Z][a-z])/g, '$1_$2')
                .replace(/([a-z\d])([A-Z])/g, '$1_$2')
                .replace(/-/g, '_')
                .toLowerCase();
   }
 
   function dasherize() {
     return this.replace(/_/g, '-');
   }
 
   function inspect(useDoubleQuotes) {
     var escapedString = this.replace(/[\x00-\x1f\\]/g, function(character) {
       if (character in String.specialChar) {
         return String.specialChar[character];
       }
       return '\\u00' + character.charCodeAt().toPaddedString(2, 16);
     });
     if (useDoubleQuotes) return '"' + escapedString.replace(/"/g, '\\"') + '"';
     return "'" + escapedString.replace(/'/g, '\\\'') + "'";
   }
 
   function toJSON() {
     return this.inspect(true);
   }
 
   function unfilterJSON(filter) {
     return this.replace(filter || Prototype.JSONFilter, '$1');
   }
 
   function isJSON() {
     var str = this;
     if (str.blank()) return false;
     str = this.replace(/\\./g, '@').replace(/"[^"\\\n\r]*"/g, '');
     return (/^[,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t]*$/).test(str);
   }
 
   function evalJSON(sanitize) {
     var json = this.unfilterJSON();
     try {
       if (!sanitize || json.isJSON()) return eval('(' + json + ')');
     } catch (e) { }
     throw new SyntaxError('Badly formed JSON string: ' + this.inspect());
   }
 
   function include(pattern) {
     return this.indexOf(pattern) > -1;
   }
 
   function startsWith(pattern) {
     return this.indexOf(pattern) === 0;
   }
 
   function endsWith(pattern) {
     var d = this.length - pattern.length;
     return d >= 0 && this.lastIndexOf(pattern) === d;
   }
 
   function empty() {
     return this == '';
   }
 
   function blank() {
     return /^\s*$/.test(this);
   }
 
   function interpolate(object, pattern) {
     return new Template(this, pattern).evaluate(object);
   }
 
   return {
     gsub:           gsub,
     sub:            sub,
     scan:           scan,
     truncate:       truncate,
     strip:          String.prototype.trim ? String.prototype.trim : strip,
     stripTags:      stripTags,
     stripScripts:   stripScripts,
     extractScripts: extractScripts,
     evalScripts:    evalScripts,
     escapeHTML:     escapeHTML,
     unescapeHTML:   unescapeHTML,
     toQueryParams:  toQueryParams,
     parseQuery:     toQueryParams,
     toArray:        toArray,
     succ:           succ,
     times:          times,
     camelize:       camelize,
     capitalize:     capitalize,
     underscore:     underscore,
     dasherize:      dasherize,
     inspect:        inspect,
     toJSON:         toJSON,
     unfilterJSON:   unfilterJSON,
     isJSON:         isJSON,
     evalJSON:       evalJSON,
     include:        include,
     startsWith:     startsWith,
     endsWith:       endsWith,
     empty:          empty,
     blank:          blank,
     interpolate:    interpolate
   };
 })());
 
 var Template = Class.create({
   initialize: function(template, pattern) {
     this.template = template.toString();
     this.pattern = pattern || Template.Pattern;
   },
 
   evaluate: function(object) {
     if (object && Object.isFunction(object.toTemplateReplacements))
       object = object.toTemplateReplacements();
 
     return this.template.gsub(this.pattern, function(match) {
       if (object == null) return (match[1] + '');
 
       var before = match[1] || '';
       if (before == '\\') return match[2];
 
       var ctx = object, expr = match[3];
       var pattern = /^([^.[]+|\[((?:.*?[^\\])?)\])(\.|\[|$)/;
       match = pattern.exec(expr);
       if (match == null) return before;
 
       while (match != null) {
         var comp = match[1].startsWith('[') ? match[2].replace(/\\\\]/g, ']') : match[1];
         ctx = ctx[comp];
         if (null == ctx || '' == match[3]) break;
         expr = expr.substring('[' == match[3] ? match[1].length : match[0].length);
         match = pattern.exec(expr);
       }
 
       return before + String.interpret(ctx);
     });
   }
 });
 Template.Pattern = /(^|.|\r|\n)(#\{(.*?)\})/;
 
 var $break = { };
 
 var Enumerable = (function() {
   function each(iterator, context) {
     var index = 0;
     try {
       this._each(function(value) {
         iterator.call(context, value, index++);
       });
     } catch (e) {
       if (e != $break) throw e;
     }
     return this;
   }
 
   function eachSlice(number, iterator, context) {
     var index = -number, slices = [], array = this.toArray();
     if (number < 1) return array;
     while ((index += number) < array.length)
       slices.push(array.slice(index, index+number));
     return slices.collect(iterator, context);
   }
 
   function all(iterator, context) {
     iterator = iterator || Prototype.K;
     var result = true;
     this.each(function(value, index) {
       result = result && !!iterator.call(context, value, index);
       if (!result) throw $break;
     });
     return result;
   }
 
   function any(iterator, context) {
     iterator = iterator || Prototype.K;
     var result = false;
     this.each(function(value, index) {
       if (result = !!iterator.call(context, value, index))
         throw $break;
     });
     return result;
   }
 
   function collect(iterator, context) {
     iterator = iterator || Prototype.K;
     var results = [];
     this.each(function(value, index) {
       results.push(iterator.call(context, value, index));
     });
     return results;
   }
 
   function detect(iterator, context) {
     var result;
     this.each(function(value, index) {
       if (iterator.call(context, value, index)) {
         result = value;
         throw $break;
       }
     });
     return result;
   }
 
   function findAll(iterator, context) {
     var results = [];
     this.each(function(value, index) {
       if (iterator.call(context, value, index))
         results.push(value);
     });
     return results;
   }
 
   function grep(filter, iterator, context) {
     iterator = iterator || Prototype.K;
     var results = [];
 
     if (Object.isString(filter))
       filter = new RegExp(RegExp.escape(filter));
 
     this.each(function(value, index) {
       if (filter.match(value))
         results.push(iterator.call(context, value, index));
     });
     return results;
   }
 
   function include(object) {
     if (Object.isFunction(this.indexOf))
       if (this.indexOf(object) != -1) return true;
 
     var found = false;
     this.each(function(value) {
       if (value == object) {
         found = true;
         throw $break;
       }
     });
     return found;
   }
 
   function inGroupsOf(number, fillWith) {
     fillWith = Object.isUndefined(fillWith) ? null : fillWith;
     return this.eachSlice(number, function(slice) {
       while(slice.length < number) slice.push(fillWith);
       return slice;
     });
   }
 
   function inject(memo, iterator, context) {
     this.each(function(value, index) {
       memo = iterator.call(context, memo, value, index);
     });
     return memo;
   }
 
   function invoke(method) {
     var args = $A(arguments).slice(1);
     return this.map(function(value) {
       return value[method].apply(value, args);
     });
   }
 
   function max(iterator, context) {
     iterator = iterator || Prototype.K;
     var result;
     this.each(function(value, index) {
       value = iterator.call(context, value, index);
       if (result == null || value >= result)
         result = value;
     });
     return result;
   }
 
   function min(iterator, context) {
     iterator = iterator || Prototype.K;
     var result;
     this.each(function(value, index) {
       value = iterator.call(context, value, index);
       if (result == null || value < result)
         result = value;
     });
     return result;
   }
 
   function partition(iterator, context) {
     iterator = iterator || Prototype.K;
     var trues = [], falses = [];
     this.each(function(value, index) {
       (iterator.call(context, value, index) ?
         trues : falses).push(value);
     });
     return [trues, falses];
   }
 
   function pluck(property) {
     var results = [];
     this.each(function(value) {
       results.push(value[property]);
     });
     return results;
   }
 
   function reject(iterator, context) {
     var results = [];
     this.each(function(value, index) {
       if (!iterator.call(context, value, index))
         results.push(value);
     });
     return results;
   }
 
   function sortBy(iterator, context) {
     return this.map(function(value, index) {
       return {
         value: value,
         criteria: iterator.call(context, value, index)
       };
     }).sort(function(left, right) {
       var a = left.criteria, b = right.criteria;
       return a < b ? -1 : a > b ? 1 : 0;
     }).pluck('value');
   }
 
   function toArray() {
     return this.map();
   }
 
   function zip() {
     var iterator = Prototype.K, args = $A(arguments);
     if (Object.isFunction(args.last()))
       iterator = args.pop();
 
     var collections = [this].concat(args).map($A);
     return this.map(function(value, index) {
       return iterator(collections.pluck(index));
     });
   }
 
   function size() {
     return this.toArray().length;
   }
 
   function inspect() {
     return '#<Enumerable:' + this.toArray().inspect() + '>';
   }
 
 
 
 
 
 
 
 
 
   return {
     each:       each,
     eachSlice:  eachSlice,
     all:        all,
     every:      all,
     any:        any,
     some:       any,
     collect:    collect,
     map:        collect,
     detect:     detect,
     findAll:    findAll,
     select:     findAll,
     filter:     findAll,
     grep:       grep,
     include:    include,
     member:     include,
     inGroupsOf: inGroupsOf,
     inject:     inject,
     invoke:     invoke,
     max:        max,
     min:        min,
     partition:  partition,
     pluck:      pluck,
     reject:     reject,
     sortBy:     sortBy,
     toArray:    toArray,
     entries:    toArray,
     zip:        zip,
     size:       size,
     inspect:    inspect,
     find:       detect
   };
 })();
 function $A(iterable) {
   if (!iterable) return [];
   if ('toArray' in Object(iterable)) return iterable.toArray();
   var length = iterable.length || 0, results = new Array(length);
   while (length--) results[length] = iterable[length];
   return results;
 }
 
 function $w(string) {
   if (!Object.isString(string)) return [];
   string = string.strip();
   return string ? string.split(/\s+/) : [];
 }
 
 Array.from = $A;
 
 
 (function() {
   var arrayProto = Array.prototype,
       slice = arrayProto.slice,
       _each = arrayProto.forEach; // use native browser JS 1.6 implementation if available
 
   function each(iterator) {
     for (var i = 0, length = this.length; i < length; i++)
       iterator(this[i]);
   }
   if (!_each) _each = each;
 
   function clear() {
     this.length = 0;
     return this;
   }
 
   function first() {
     return this[0];
   }
 
   function last() {
     return this[this.length - 1];
   }
 
   function compact() {
     return this.select(function(value) {
       return value != null;
     });
   }
 
   function flatten() {
     return this.inject([], function(array, value) {
       if (Object.isArray(value))
         return array.concat(value.flatten());
       array.push(value);
       return array;
     });
   }
 
   function without() {
     var values = slice.call(arguments, 0);
     return this.select(function(value) {
       return !values.include(value);
     });
   }
 
   function reverse(inline) {
     return (inline !== false ? this : this.toArray())._reverse();
   }
 
   function uniq(sorted) {
     return this.inject([], function(array, value, index) {
       if (0 == index || (sorted ? array.last() != value : !array.include(value)))
         array.push(value);
       return array;
     });
   }
 
   function intersect(array) {
     return this.uniq().findAll(function(item) {
       return array.detect(function(value) { return item === value });
     });
   }
 
 
   function clone() {
     return slice.call(this, 0);
   }
 
   function size() {
     return this.length;
   }
 
   function inspect() {
     return '[' + this.map(Object.inspect).join(', ') + ']';
   }
 
   function toJSON() {
     var results = [];
     this.each(function(object) {
       var value = Object.toJSON(object);
       if (!Object.isUndefined(value)) results.push(value);
     });
     return '[' + results.join(', ') + ']';
   }
 
   function indexOf(item, i) {
     i || (i = 0);
     var length = this.length;
     if (i < 0) i = length + i;
     for (; i < length; i++)
       if (this[i] === item) return i;
     return -1;
   }
 
   function lastIndexOf(item, i) {
     i = isNaN(i) ? this.length : (i < 0 ? this.length + i : i) + 1;
     var n = this.slice(0, i).reverse().indexOf(item);
     return (n < 0) ? n : i - n - 1;
   }
 
   function concat() {
     var array = slice.call(this, 0), item;
     for (var i = 0, length = arguments.length; i < length; i++) {
       item = arguments[i];
       if (Object.isArray(item) && !('callee' in item)) {
         for (var j = 0, arrayLength = item.length; j < arrayLength; j++)
           array.push(item[j]);
       } else {
         array.push(item);
       }
     }
     return array;
   }
 
   Object.extend(arrayProto, Enumerable);
 
   if (!arrayProto._reverse)
     arrayProto._reverse = arrayProto.reverse;
 
   Object.extend(arrayProto, {
     _each:     _each,
     clear:     clear,
     first:     first,
     last:      last,
     compact:   compact,
     flatten:   flatten,
     without:   without,
     reverse:   reverse,
     uniq:      uniq,
     intersect: intersect,
     clone:     clone,
     toArray:   clone,
     size:      size,
     inspect:   inspect,
     toJSON:    toJSON
   });
 
   var CONCAT_ARGUMENTS_BUGGY = (function() {
     return [].concat(arguments)[0][0] !== 1;
   })(1,2)
 
   if (CONCAT_ARGUMENTS_BUGGY) arrayProto.concat = concat;
 
   if (!arrayProto.indexOf) arrayProto.indexOf = indexOf;
   if (!arrayProto.lastIndexOf) arrayProto.lastIndexOf = lastIndexOf;
 })();
 function $H(object) {
   return new Hash(object);
 };
 
 var Hash = Class.create(Enumerable, (function() {
   function initialize(object) {
     this._object = Object.isHash(object) ? object.toObject() : Object.clone(object);
   }
 
   function _each(iterator) {
     for (var key in this._object) {
       var value = this._object[key], pair = [key, value];
       pair.key = key;
       pair.value = value;
       iterator(pair);
     }
   }
 
   function set(key, value) {
     return this._object[key] = value;
   }
 
   function get(key) {
     if (this._object[key] !== Object.prototype[key])
       return this._object[key];
   }
 
   function unset(key) {
     var value = this._object[key];
     delete this._object[key];
     return value;
   }
 
   function toObject() {
     return Object.clone(this._object);
   }
 
   function keys() {
     return this.pluck('key');
   }
 
   function values() {
     return this.pluck('value');
   }
 
   function index(value) {
     var match = this.detect(function(pair) {
       return pair.value === value;
     });
     return match && match.key;
   }
 
   function merge(object) {
     return this.clone().update(object);
   }
 
   function update(object) {
     return new Hash(object).inject(this, function(result, pair) {
       result.set(pair.key, pair.value);
       return result;
     });
   }
 
   function toQueryPair(key, value) {
     if (Object.isUndefined(value)) return key;
     return key + '=' + encodeURIComponent(String.interpret(value));
   }
 
   function toQueryString() {
     return this.inject([], function(results, pair) {
       var key = encodeURIComponent(pair.key), values = pair.value;
 
       if (values && typeof values == 'object') {
         if (Object.isArray(values))
           return results.concat(values.map(toQueryPair.curry(key)));
       } else results.push(toQueryPair(key, values));
       return results;
     }).join('&');
   }
 
   function inspect() {
     return '#<Hash:{' + this.map(function(pair) {
       return pair.map(Object.inspect).join(': ');
     }).join(', ') + '}>';
   }
 
   function toJSON() {
     return Object.toJSON(this.toObject());
   }
 
   function clone() {
     return new Hash(this);
   }
 
   return {
     initialize:             initialize,
     _each:                  _each,
     set:                    set,
     get:                    get,
     unset:                  unset,
     toObject:               toObject,
     toTemplateReplacements: toObject,
     keys:                   keys,
     values:                 values,
     index:                  index,
     merge:                  merge,
     update:                 update,
     toQueryString:          toQueryString,
     inspect:                inspect,
     toJSON:                 toJSON,
     clone:                  clone
   };
 })());
 
 Hash.from = $H;
 Object.extend(Number.prototype, (function() {
   function toColorPart() {
     return this.toPaddedString(2, 16);
   }
 
   function succ() {
     return this + 1;
   }
 
   function times(iterator, context) {
     $R(0, this, true).each(iterator, context);
     return this;
   }
 
   function toPaddedString(length, radix) {
     var string = this.toString(radix || 10);
     return '0'.times(length - string.length) + string;
   }
 
   function toJSON() {
     return isFinite(this) ? this.toString() : 'null';
   }
 
   function abs() {
     return Math.abs(this);
   }
 
   function round() {
     return Math.round(this);
   }
 
   function ceil() {
     return Math.ceil(this);
   }
 
   function floor() {
     return Math.floor(this);
   }
 
   return {
     toColorPart:    toColorPart,
     succ:           succ,
     times:          times,
     toPaddedString: toPaddedString,
     toJSON:         toJSON,
     abs:            abs,
     round:          round,
     ceil:           ceil,
     floor:          floor
   };
 })());
 
 function $R(start, end, exclusive) {
   return new ObjectRange(start, end, exclusive);
 }
 
 var ObjectRange = Class.create(Enumerable, (function() {
   function initialize(start, end, exclusive) {
     this.start = start;
     this.end = end;
     this.exclusive = exclusive;
   }
 
   function _each(iterator) {
     var value = this.start;
     while (this.include(value)) {
       iterator(value);
       value = value.succ();
     }
   }
 
   function include(value) {
     if (value < this.start)
       return false;
     if (this.exclusive)
       return value < this.end;
     return value <= this.end;
   }
 
   return {
     initialize: initialize,
     _each:      _each,
     include:    include
   };
 })());
 
 
 
 var Ajax = {
   getTransport: function() {
     return Try.these(
       function() {return new XMLHttpRequest()},
       function() {return new ActiveXObject('Msxml2.XMLHTTP')},
       function() {return new ActiveXObject('Microsoft.XMLHTTP')}
     ) || false;
   },
 
   activeRequestCount: 0
 };
 
 Ajax.Responders = {
   responders: [],
 
   _each: function(iterator) {
     this.responders._each(iterator);
   },
 
   register: function(responder) {
     if (!this.include(responder))
       this.responders.push(responder);
   },
 
   unregister: function(responder) {
     this.responders = this.responders.without(responder);
   },
 
   dispatch: function(callback, request, transport, json) {
     this.each(function(responder) {
       if (Object.isFunction(responder[callback])) {
         try {
           responder[callback].apply(responder, [request, transport, json]);
         } catch (e) { }
       }
     });
   }
 };
 
 Object.extend(Ajax.Responders, Enumerable);
 
 Ajax.Responders.register({
   onCreate:   function() { Ajax.activeRequestCount++ },
   onComplete: function() { Ajax.activeRequestCount-- }
 });
 Ajax.Base = Class.create({
   initialize: function(options) {
     this.options = {
       method:       'post',
       asynchronous: true,
       contentType:  'application/x-www-form-urlencoded',
       encoding:     'UTF-8',
       parameters:   '',
       evalJSON:     true,
       evalJS:       true
     };
     Object.extend(this.options, options || { });
 
     this.options.method = this.options.method.toLowerCase();
 
     if (Object.isString(this.options.parameters))
       this.options.parameters = this.options.parameters.toQueryParams();
     else if (Object.isHash(this.options.parameters))
       this.options.parameters = this.options.parameters.toObject();
   }
 });
 Ajax.Request = Class.create(Ajax.Base, {
   _complete: false,
 
   initialize: function($super, url, options) {
     $super(options);
     this.transport = Ajax.getTransport();
     this.request(url);
   },
 
   request: function(url) {
     this.url = url;
     this.method = this.options.method;
     var params = Object.clone(this.options.parameters);
 
     if (!['get', 'post'].include(this.method)) {
       params['_method'] = this.method;
       this.method = 'post';
     }
 
     this.parameters = params;
 
     if (params = Object.toQueryString(params)) {
       if (this.method == 'get')
         this.url += (this.url.include('?') ? '&' : '?') + params;
       else if (/Konqueror|Safari|KHTML/.test(navigator.userAgent))
         params += '&_=';
     }
 
     try {
       var response = new Ajax.Response(this);
       if (this.options.onCreate) this.options.onCreate(response);
       Ajax.Responders.dispatch('onCreate', this, response);
 
       this.transport.open(this.method.toUpperCase(), this.url,
         this.options.asynchronous);
 
       if (this.options.asynchronous) this.respondToReadyState.bind(this).defer(1);
 
       this.transport.onreadystatechange = this.onStateChange.bind(this);
       this.setRequestHeaders();
 
       this.body = this.method == 'post' ? (this.options.postBody || params) : null;
       this.transport.send(this.body);
 
       /* Force Firefox to handle ready state 4 for synchronous requests */
       if (!this.options.asynchronous && this.transport.overrideMimeType)
         this.onStateChange();
 
     }
     catch (e) {
       this.dispatchException(e);
     }
   },
 
   onStateChange: function() {
     var readyState = this.transport.readyState;
     if (readyState > 1 && !((readyState == 4) && this._complete))
       this.respondToReadyState(this.transport.readyState);
   },
 
   setRequestHeaders: function() {
     var headers = {
       'X-Requested-With': 'XMLHttpRequest',
       'X-Prototype-Version': Prototype.Version,
       'Accept': 'text/javascript, text/html, application/xml, text/xml, */*'
     };
 
     if (this.method == 'post') {
       headers['Content-type'] = this.options.contentType +
         (this.options.encoding ? '; charset=' + this.options.encoding : '');
 
       /* Force "Connection: close" for older Mozilla browsers to work
        * around a bug where XMLHttpRequest sends an incorrect
        * Content-length header. See Mozilla Bugzilla #246651.
        */
       if (this.transport.overrideMimeType &&
           (navigator.userAgent.match(/Gecko\/(\d{4})/) || [0,2005])[1] < 2005)
             headers['Connection'] = 'close';
     }
 
     if (typeof this.options.requestHeaders == 'object') {
       var extras = this.options.requestHeaders;
 
       if (Object.isFunction(extras.push))
         for (var i = 0, length = extras.length; i < length; i += 2)
           headers[extras[i]] = extras[i+1];
       else
         $H(extras).each(function(pair) { headers[pair.key] = pair.value });
     }
 
     for (var name in headers)
       this.transport.setRequestHeader(name, headers[name]);
   },
 
   success: function() {
     var status = this.getStatus();
     return !status || (status >= 200 && status < 300);
   },
 
   getStatus: function() {
     try {
       return this.transport.status || 0;
     } catch (e) { return 0 }
   },
 
   respondToReadyState: function(readyState) {
     var state = Ajax.Request.Events[readyState], response = new Ajax.Response(this);
 
     if (state == 'Complete') {
       try {
         this._complete = true;
         (this.options['on' + response.status]
          || this.options['on' + (this.success() ? 'Success' : 'Failure')]
          || Prototype.emptyFunction)(response, response.headerJSON);
       } catch (e) {
         this.dispatchException(e);
       }
 
       var contentType = response.getHeader('Content-type');
       if (this.options.evalJS == 'force'
           || (this.options.evalJS && this.isSameOrigin() && contentType
           && contentType.match(/^\s*(text|application)\/(x-)?(java|ecma)script(;.*)?\s*$/i)))
         this.evalResponse();
     }
 
     try {
       (this.options['on' + state] || Prototype.emptyFunction)(response, response.headerJSON);
       Ajax.Responders.dispatch('on' + state, this, response, response.headerJSON);
     } catch (e) {
       this.dispatchException(e);
     }
 
     if (state == 'Complete') {
       this.transport.onreadystatechange = Prototype.emptyFunction;
     }
   },
 
   isSameOrigin: function() {
     var m = this.url.match(/^\s*https?:\/\/[^\/]*/);
     return !m || (m[0] == '#{protocol}//#{domain}#{port}'.interpolate({
       protocol: location.protocol,
       domain: document.domain,
       port: location.port ? ':' + location.port : ''
     }));
   },
 
   getHeader: function(name) {
     try {
       return this.transport.getResponseHeader(name) || null;
     } catch (e) { return null; }
   },
 
   evalResponse: function() {
     try {
       return eval((this.transport.responseText || '').unfilterJSON());
     } catch (e) {
       this.dispatchException(e);
     }
   },
 
   dispatchException: function(exception) {
     (this.options.onException || Prototype.emptyFunction)(this, exception);
     Ajax.Responders.dispatch('onException', this, exception);
   }
 });
 
 Ajax.Request.Events =
   ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];
 
 
 
 
 
 
 
 
 Ajax.Response = Class.create({
   initialize: function(request){
     this.request = request;
     var transport  = this.transport  = request.transport,
         readyState = this.readyState = transport.readyState;
 
     if((readyState > 2 && !Prototype.Browser.IE) || readyState == 4) {
       this.status       = this.getStatus();
       this.statusText   = this.getStatusText();
       this.responseText = String.interpret(transport.responseText);
       this.headerJSON   = this._getHeaderJSON();
     }
 
     if(readyState == 4) {
       var xml = transport.responseXML;
       this.responseXML  = Object.isUndefined(xml) ? null : xml;
       this.responseJSON = this._getResponseJSON();
     }
   },
 
   status:      0,
 
   statusText: '',
 
   getStatus: Ajax.Request.prototype.getStatus,
 
   getStatusText: function() {
     try {
       return this.transport.statusText || '';
     } catch (e) { return '' }
   },
 
   getHeader: Ajax.Request.prototype.getHeader,
 
   getAllHeaders: function() {
     try {
       return this.getAllResponseHeaders();
     } catch (e) { return null }
   },
 
   getResponseHeader: function(name) {
     return this.transport.getResponseHeader(name);
   },
 
   getAllResponseHeaders: function() {
     return this.transport.getAllResponseHeaders();
   },
 
   _getHeaderJSON: function() {
     var json = this.getHeader('X-JSON');
     if (!json) return null;
     json = decodeURIComponent(escape(json));
     try {
       return json.evalJSON(this.request.options.sanitizeJSON ||
         !this.request.isSameOrigin());
     } catch (e) {
       this.request.dispatchException(e);
     }
   },
 
   _getResponseJSON: function() {
     var options = this.request.options;
     if (!options.evalJSON || (options.evalJSON != 'force' &&
       !(this.getHeader('Content-type') || '').include('application/json')) ||
         this.responseText.blank())
           return null;
     try {
       return this.responseText.evalJSON(options.sanitizeJSON ||
         !this.request.isSameOrigin());
     } catch (e) {
       this.request.dispatchException(e);
     }
   }
 });
 
 Ajax.Updater = Class.create(Ajax.Request, {
   initialize: function($super, container, url, options) {
     this.container = {
       success: (container.success || container),
       failure: (container.failure || (container.success ? null : container))
     };
 
     options = Object.clone(options);
     var onComplete = options.onComplete;
     options.onComplete = (function(response, json) {
       this.updateContent(response.responseText);
       if (Object.isFunction(onComplete)) onComplete(response, json);
     }).bind(this);
 
     $super(url, options);
   },
 
   updateContent: function(responseText) {
     var receiver = this.container[this.success() ? 'success' : 'failure'],
         options = this.options;
 
     if (!options.evalScripts) responseText = responseText.stripScripts();
 
     if (receiver = $(receiver)) {
       if (options.insertion) {
         if (Object.isString(options.insertion)) {
           var insertion = { }; insertion[options.insertion] = responseText;
           receiver.insert(insertion);
         }
         else options.insertion(receiver, responseText);
       }
       else receiver.update(responseText);
     }
   }
 });
 
 Ajax.PeriodicalUpdater = Class.create(Ajax.Base, {
   initialize: function($super, container, url, options) {
     $super(options);
     this.onComplete = this.options.onComplete;
 
     this.frequency = (this.options.frequency || 2);
     this.decay = (this.options.decay || 1);
 
     this.updater = { };
     this.container = container;
     this.url = url;
 
     this.start();
   },
 
   start: function() {
     this.options.onComplete = this.updateComplete.bind(this);
     this.onTimerEvent();
   },
 
   stop: function() {
     this.updater.options.onComplete = undefined;
     clearTimeout(this.timer);
     (this.onComplete || Prototype.emptyFunction).apply(this, arguments);
   },
 
   updateComplete: function(response) {
     if (this.options.decay) {
       this.decay = (response.responseText == this.lastText ?
         this.decay * this.options.decay : 1);
 
       this.lastText = response.responseText;
     }
     this.timer = this.onTimerEvent.bind(this).delay(this.decay * this.frequency);
   },
 
   onTimerEvent: function() {
     this.updater = new Ajax.Updater(this.container, this.url, this.options);
   }
 });
 
 
 
 function $(element) {
   if (arguments.length > 1) {
     for (var i = 0, elements = [], length = arguments.length; i < length; i++)
       elements.push($(arguments[i]));
     return elements;
   }
   if (Object.isString(element))
     element = document.getElementById(element);
   return Element.extend(element);
 }
 
 if (Prototype.BrowserFeatures.XPath) {
   document._getElementsByXPath = function(expression, parentElement) {
     var results = [];
     var query = document.evaluate(expression, $(parentElement) || document,
       null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
     for (var i = 0, length = query.snapshotLength; i < length; i++)
       results.push(Element.extend(query.snapshotItem(i)));
     return results;
   };
 }
 
 /*--------------------------------------------------------------------------*/
 
 if (!window.Node) var Node = { };
 
 if (!Node.ELEMENT_NODE) {
   Object.extend(Node, {
     ELEMENT_NODE: 1,
     ATTRIBUTE_NODE: 2,
     TEXT_NODE: 3,
     CDATA_SECTION_NODE: 4,
     ENTITY_REFERENCE_NODE: 5,
     ENTITY_NODE: 6,
     PROCESSING_INSTRUCTION_NODE: 7,
     COMMENT_NODE: 8,
     DOCUMENT_NODE: 9,
     DOCUMENT_TYPE_NODE: 10,
     DOCUMENT_FRAGMENT_NODE: 11,
     NOTATION_NODE: 12
   });
 }
 
 
 (function(global) {
 
   var SETATTRIBUTE_IGNORES_NAME = (function(){
     var elForm = document.createElement("form");
     var elInput = document.createElement("input");
     var root = document.documentElement;
     elInput.setAttribute("name", "test");
     elForm.appendChild(elInput);
     root.appendChild(elForm);
     var isBuggy = elForm.elements
       ? (typeof elForm.elements.test == "undefined")
       : null;
     root.removeChild(elForm);
     elForm = elInput = null;
     return isBuggy;
   })();
 
   var element = global.Element;
   global.Element = function(tagName, attributes) {
     attributes = attributes || { };
     tagName = tagName.toLowerCase();
     var cache = Element.cache;
     if (SETATTRIBUTE_IGNORES_NAME && attributes.name) {
       tagName = '<' + tagName + ' name="' + attributes.name + '">';
       delete attributes.name;
       return Element.writeAttribute(document.createElement(tagName), attributes);
     }
     if (!cache[tagName]) cache[tagName] = Element.extend(document.createElement(tagName));
     return Element.writeAttribute(cache[tagName].cloneNode(false), attributes);
   };
   Object.extend(global.Element, element || { });
   if (element) global.Element.prototype = element.prototype;
 })(this);
 
 Element.cache = { };
 Element.idCounter = 1;
 
 Element.Methods = {
   visible: function(element) {
     return $(element).style.display != 'none';
   },
 
   toggle: function(element) {
     element = $(element);
     Element[Element.visible(element) ? 'hide' : 'show'](element);
     return element;
   },
 
 
   hide: function(element) {
     element = $(element);
     element.style.display = 'none';
     return element;
   },
 
   show: function(element) {
     element = $(element);
     element.style.display = '';
     return element;
   },
 
   remove: function(element) {
     element = $(element);
     element.parentNode.removeChild(element);
     return element;
   },
 
   update: (function(){
 
     var SELECT_ELEMENT_INNERHTML_BUGGY = (function(){
       var el = document.createElement("select"),
           isBuggy = true;
       el.innerHTML = "<option value=\"test\">test</option>";
       if (el.options && el.options[0]) {
         isBuggy = el.options[0].nodeName.toUpperCase() !== "OPTION";
       }
       el = null;
       return isBuggy;
     })();
 
     var TABLE_ELEMENT_INNERHTML_BUGGY = (function(){
       try {
         var el = document.createElement("table");
         if (el && el.tBodies) {
           el.innerHTML = "<tbody><tr><td>test</td></tr></tbody>";
           var isBuggy = typeof el.tBodies[0] == "undefined";
           el = null;
           return isBuggy;
         }
       } catch (e) {
         return true;
       }
     })();
 
     var SCRIPT_ELEMENT_REJECTS_TEXTNODE_APPENDING = (function () {
       var s = document.createElement("script"),
           isBuggy = false;
       try {
         s.appendChild(document.createTextNode(""));
         isBuggy = !s.firstChild ||
           s.firstChild && s.firstChild.nodeType !== 3;
       } catch (e) {
         isBuggy = true;
       }
       s = null;
       return isBuggy;
     })();
 
     function update(element, content) {
       element = $(element);
 
       if (content && content.toElement)
         content = content.toElement();
 
       if (Object.isElement(content))
         return element.update().insert(content);
 
       content = Object.toHTML(content);
 
       var tagName = element.tagName.toUpperCase();
 
       if (tagName === 'SCRIPT' && SCRIPT_ELEMENT_REJECTS_TEXTNODE_APPENDING) {
         element.text = content;
         return element;
       }
 
       if (SELECT_ELEMENT_INNERHTML_BUGGY || TABLE_ELEMENT_INNERHTML_BUGGY) {
         if (tagName in Element._insertionTranslations.tags) {
           while (element.firstChild) {
             element.removeChild(element.firstChild);
           }
           Element._getContentFromAnonymousElement(tagName, content.stripScripts())
             .each(function(node) {
               element.appendChild(node)
             });
         }
         else {
           element.innerHTML = content.stripScripts();
         }
       }
       else {
         element.innerHTML = content.stripScripts();
       }
 
       content.evalScripts.bind(content).defer();
       return element;
     }
 
     return update;
   })(),
 
   replace: function(element, content) {
     element = $(element);
     if (content && content.toElement) content = content.toElement();
     else if (!Object.isElement(content)) {
       content = Object.toHTML(content);
       var range = element.ownerDocument.createRange();
       range.selectNode(element);
       content.evalScripts.bind(content).defer();
       content = range.createContextualFragment(content.stripScripts());
     }
     element.parentNode.replaceChild(content, element);
     return element;
   },
 
   insert: function(element, insertions) {
     element = $(element);
 
     if (Object.isString(insertions) || Object.isNumber(insertions) ||
         Object.isElement(insertions) || (insertions && (insertions.toElement || insertions.toHTML)))
           insertions = {bottom:insertions};
 
     var content, insert, tagName, childNodes;
 
     for (var position in insertions) {
       content  = insertions[position];
       position = position.toLowerCase();
       insert = Element._insertionTranslations[position];
 
       if (content && content.toElement) content = content.toElement();
       if (Object.isElement(content)) {
         insert(element, content);
         continue;
       }
 
       content = Object.toHTML(content);
 
       tagName = ((position == 'before' || position == 'after')
         ? element.parentNode : element).tagName.toUpperCase();
 
       childNodes = Element._getContentFromAnonymousElement(tagName, content.stripScripts());
 
       if (position == 'top' || position == 'after') childNodes.reverse();
       childNodes.each(insert.curry(element));
 
       content.evalScripts.bind(content).defer();
     }
 
     return element;
   },
 
   wrap: function(element, wrapper, attributes) {
     element = $(element);
     if (Object.isElement(wrapper))
       $(wrapper).writeAttribute(attributes || { });
     else if (Object.isString(wrapper)) wrapper = new Element(wrapper, attributes);
     else wrapper = new Element('div', wrapper);
     if (element.parentNode)
       element.parentNode.replaceChild(wrapper, element);
     wrapper.appendChild(element);
     return wrapper;
   },
 
   inspect: function(element) {
     element = $(element);
     var result = '<' + element.tagName.toLowerCase();
     $H({'id': 'id', 'className': 'class'}).each(function(pair) {
       var property = pair.first(), attribute = pair.last();
       var value = (element[property] || '').toString();
       if (value) result += ' ' + attribute + '=' + value.inspect(true);
     });
     return result + '>';
   },
 
   recursivelyCollect: function(element, property) {
     element = $(element);
     var elements = [];
     while (element = element[property])
       if (element.nodeType == 1)
         elements.push(Element.extend(element));
     return elements;
   },
 
   ancestors: function(element) {
     return Element.recursivelyCollect(element, 'parentNode');
   },
 
   descendants: function(element) {
     return Element.select(element, "*");
   },
 
   firstDescendant: function(element) {
     element = $(element).firstChild;
     while (element && element.nodeType != 1) element = element.nextSibling;
     return $(element);
   },
 
   immediateDescendants: function(element) {
     if (!(element = $(element).firstChild)) return [];
     while (element && element.nodeType != 1) element = element.nextSibling;
     if (element) return [element].concat($(element).nextSiblings());
     return [];
   },
 
   previousSiblings: function(element) {
     return Element.recursivelyCollect(element, 'previousSibling');
   },
 
   nextSiblings: function(element) {
     return Element.recursivelyCollect(element, 'nextSibling');
   },
 
   siblings: function(element) {
     element = $(element);
     return Element.previousSiblings(element).reverse()
       .concat(Element.nextSiblings(element));
   },
 
   match: function(element, selector) {
     if (Object.isString(selector))
       selector = new Selector(selector);
     return selector.match($(element));
   },
 
   up: function(element, expression, index) {
     element = $(element);
     if (arguments.length == 1) return $(element.parentNode);
     var ancestors = Element.ancestors(element);
     return Object.isNumber(expression) ? ancestors[expression] :
       Selector.findElement(ancestors, expression, index);
   },
 
   down: function(element, expression, index) {
     element = $(element);
     if (arguments.length == 1) return Element.firstDescendant(element);
     return Object.isNumber(expression) ? Element.descendants(element)[expression] :
       Element.select(element, expression)[index || 0];
   },
 
   previous: function(element, expression, index) {
     element = $(element);
     if (arguments.length == 1) return $(Selector.handlers.previousElementSibling(element));
     var previousSiblings = Element.previousSiblings(element);
     return Object.isNumber(expression) ? previousSiblings[expression] :
       Selector.findElement(previousSiblings, expression, index);
   },
 
   next: function(element, expression, index) {
     element = $(element);
     if (arguments.length == 1) return $(Selector.handlers.nextElementSibling(element));
     var nextSiblings = Element.nextSiblings(element);
     return Object.isNumber(expression) ? nextSiblings[expression] :
       Selector.findElement(nextSiblings, expression, index);
   },
 
 
   select: function(element) {
     var args = Array.prototype.slice.call(arguments, 1);
     return Selector.findChildElements(element, args);
   },
 
   adjacent: function(element) {
     var args = Array.prototype.slice.call(arguments, 1);
     return Selector.findChildElements(element.parentNode, args).without(element);
   },
 
   identify: function(element) {
     element = $(element);
     var id = Element.readAttribute(element, 'id');
     if (id) return id;
     do { id = 'anonymous_element_' + Element.idCounter++ } while ($(id));
     Element.writeAttribute(element, 'id', id);
     return id;
   },
 
   readAttribute: function(element, name) {
     element = $(element);
     if (Prototype.Browser.IE) {
       var t = Element._attributeTranslations.read;
       if (t.values[name]) return t.values[name](element, name);
       if (t.names[name]) name = t.names[name];
       if (name.include(':')) {
         return (!element.attributes || !element.attributes[name]) ? null :
          element.attributes[name].value;
       }
     }
     return element.getAttribute(name);
   },
 
   writeAttribute: function(element, name, value) {
     element = $(element);
     var attributes = { }, t = Element._attributeTranslations.write;
 
     if (typeof name == 'object') attributes = name;
     else attributes[name] = Object.isUndefined(value) ? true : value;
 
     for (var attr in attributes) {
       name = t.names[attr] || attr;
       value = attributes[attr];
       if (t.values[attr]) name = t.values[attr](element, value);
       if (value === false || value === null)
         element.removeAttribute(name);
       else if (value === true)
         element.setAttribute(name, name);
       else element.setAttribute(name, value);
     }
     return element;
   },
 
   getHeight: function(element) {
     return Element.getDimensions(element).height;
   },
 
   getWidth: function(element) {
     return Element.getDimensions(element).width;
   },
 
   classNames: function(element) {
     return new Element.ClassNames(element);
   },
 
   hasClassName: function(element, className) {
     if (!(element = $(element))) return;
     var elementClassName = element.className;
     return (elementClassName.length > 0 && (elementClassName == className ||
       new RegExp("(^|\\s)" + className + "(\\s|$)").test(elementClassName)));
   },
 
   addClassName: function(element, className) {
     if (!(element = $(element))) return;
     if (!Element.hasClassName(element, className))
       element.className += (element.className ? ' ' : '') + className;
     return element;
   },
 
   removeClassName: function(element, className) {
     if (!(element = $(element))) return;
     element.className = element.className.replace(
       new RegExp("(^|\\s+)" + className + "(\\s+|$)"), ' ').strip();
     return element;
   },
 
   toggleClassName: function(element, className) {
     if (!(element = $(element))) return;
     return Element[Element.hasClassName(element, className) ?
       'removeClassName' : 'addClassName'](element, className);
   },
 
   cleanWhitespace: function(element) {
     element = $(element);
     var node = element.firstChild;
     while (node) {
       var nextNode = node.nextSibling;
       if (node.nodeType == 3 && !/\S/.test(node.nodeValue))
         element.removeChild(node);
       node = nextNode;
     }
     return element;
   },
 
   empty: function(element) {
     return $(element).innerHTML.blank();
   },
 
   descendantOf: function(element, ancestor) {
     element = $(element), ancestor = $(ancestor);
 
     if (element.compareDocumentPosition)
       return (element.compareDocumentPosition(ancestor) & 8) === 8;
 
     if (ancestor.contains)
       return ancestor.contains(element) && ancestor !== element;
 
     while (element = element.parentNode)
       if (element == ancestor) return true;
 
     return false;
   },
 
   scrollTo: function(element) {
     element = $(element);
     var pos = Element.cumulativeOffset(element);
     window.scrollTo(pos[0], pos[1]);
     return element;
   },
 
   getStyle: function(element, style) {
     element = $(element);
     style = style == 'float' ? 'cssFloat' : style.camelize();
     var value = element.style[style];
     if (!value || value == 'auto') {
       var css = document.defaultView.getComputedStyle(element, null);
       value = css ? css[style] : null;
     }
     if (style == 'opacity') return value ? parseFloat(value) : 1.0;
     return value == 'auto' ? null : value;
   },
 
   getOpacity: function(element) {
     return $(element).getStyle('opacity');
   },
 
   setStyle: function(element, styles) {
     element = $(element);
     var elementStyle = element.style, match;
     if (Object.isString(styles)) {
       element.style.cssText += ';' + styles;
       return styles.include('opacity') ?
         element.setOpacity(styles.match(/opacity:\s*(\d?\.?\d*)/)[1]) : element;
     }
     for (var property in styles)
       if (property == 'opacity') element.setOpacity(styles[property]);
       else
         elementStyle[(property == 'float' || property == 'cssFloat') ?
           (Object.isUndefined(elementStyle.styleFloat) ? 'cssFloat' : 'styleFloat') :
             property] = styles[property];
 
     return element;
   },
 
   setOpacity: function(element, value) {
     element = $(element);
     element.style.opacity = (value == 1 || value === '') ? '' :
       (value < 0.00001) ? 0 : value;
     return element;
   },
 
   getDimensions: function(element) {
     element = $(element);
     var display = Element.getStyle(element, 'display');
     if (display != 'none' && display != null) // Safari bug
       return {width: element.offsetWidth, height: element.offsetHeight};
 
     var els = element.style;
     var originalVisibility = els.visibility;
     var originalPosition = els.position;
     var originalDisplay = els.display;
     els.visibility = 'hidden';
     if (originalPosition != 'fixed') // Switching fixed to absolute causes issues in Safari
       els.position = 'absolute';
     els.display = 'block';
     var originalWidth = element.clientWidth;
     var originalHeight = element.clientHeight;
     els.display = originalDisplay;
     els.position = originalPosition;
     els.visibility = originalVisibility;
     return {width: originalWidth, height: originalHeight};
   },
 
   makePositioned: function(element) {
     element = $(element);
     var pos = Element.getStyle(element, 'position');
     if (pos == 'static' || !pos) {
       element._madePositioned = true;
       element.style.position = 'relative';
       if (Prototype.Browser.Opera) {
         element.style.top = 0;
         element.style.left = 0;
       }
     }
     return element;
   },
 
   undoPositioned: function(element) {
     element = $(element);
     if (element._madePositioned) {
       element._madePositioned = undefined;
       element.style.position =
         element.style.top =
         element.style.left =
         element.style.bottom =
         element.style.right = '';
     }
     return element;
   },
 
   makeClipping: function(element) {
     element = $(element);
     if (element._overflow) return element;
     element._overflow = Element.getStyle(element, 'overflow') || 'auto';
     if (element._overflow !== 'hidden')
       element.style.overflow = 'hidden';
     return element;
   },
 
   undoClipping: function(element) {
     element = $(element);
     if (!element._overflow) return element;
     element.style.overflow = element._overflow == 'auto' ? '' : element._overflow;
     element._overflow = null;
     return element;
   },
 
   cumulativeOffset: function(element) {
     var valueT = 0, valueL = 0;
     do {
       valueT += element.offsetTop  || 0;
       valueL += element.offsetLeft || 0;
       element = element.offsetParent;
     } while (element);
     return Element._returnOffset(valueL, valueT);
   },
 
   positionedOffset: function(element) {
     var valueT = 0, valueL = 0;
     do {
       valueT += element.offsetTop  || 0;
       valueL += element.offsetLeft || 0;
       element = element.offsetParent;
       if (element) {
         if (element.tagName.toUpperCase() == 'BODY') break;
         var p = Element.getStyle(element, 'position');
         if (p !== 'static') break;
       }
     } while (element);
     return Element._returnOffset(valueL, valueT);
   },
 
   absolutize: function(element) {
     element = $(element);
     if (Element.getStyle(element, 'position') == 'absolute') return element;
 
     var offsets = Element.positionedOffset(element);
     var top     = offsets[1];
     var left    = offsets[0];
     var width   = element.clientWidth;
     var height  = element.clientHeight;
 
     element._originalLeft   = left - parseFloat(element.style.left  || 0);
     element._originalTop    = top  - parseFloat(element.style.top || 0);
     element._originalWidth  = element.style.width;
     element._originalHeight = element.style.height;
 
     element.style.position = 'absolute';
     element.style.top    = top + 'px';
     element.style.left   = left + 'px';
     element.style.width  = width + 'px';
     element.style.height = height + 'px';
     return element;
   },
 
   relativize: function(element) {
     element = $(element);
     if (Element.getStyle(element, 'position') == 'relative') return element;
 
     element.style.position = 'relative';
     var top  = parseFloat(element.style.top  || 0) - (element._originalTop || 0);
     var left = parseFloat(element.style.left || 0) - (element._originalLeft || 0);
 
     element.style.top    = top + 'px';
     element.style.left   = left + 'px';
     element.style.height = element._originalHeight;
     element.style.width  = element._originalWidth;
     return element;
   },
 
   cumulativeScrollOffset: function(element) {
     var valueT = 0, valueL = 0;
     do {
       valueT += element.scrollTop  || 0;
       valueL += element.scrollLeft || 0;
       element = element.parentNode;
     } while (element);
     return Element._returnOffset(valueL, valueT);
   },
 
   getOffsetParent: function(element) {
     if (element.offsetParent) return $(element.offsetParent);
     if (element == document.body) return $(element);
 
     while ((element = element.parentNode) && element != document.body)
       if (Element.getStyle(element, 'position') != 'static')
         return $(element);
 
     return $(document.body);
   },
 
   viewportOffset: function(forElement) {
     var valueT = 0, valueL = 0;
 
     var element = forElement;
     do {
       valueT += element.offsetTop  || 0;
       valueL += element.offsetLeft || 0;
 
       if (element.offsetParent == document.body &&
         Element.getStyle(element, 'position') == 'absolute') break;
 
     } while (element = element.offsetParent);
 
     element = forElement;
     do {
       if (!Prototype.Browser.Opera || (element.tagName && (element.tagName.toUpperCase() == 'BODY'))) {
         valueT -= element.scrollTop  || 0;
         valueL -= element.scrollLeft || 0;
       }
     } while (element = element.parentNode);
 
     return Element._returnOffset(valueL, valueT);
   },
 
   clonePosition: function(element, source) {
     var options = Object.extend({
       setLeft:    true,
       setTop:     true,
       setWidth:   true,
       setHeight:  true,
       offsetTop:  0,
       offsetLeft: 0
     }, arguments[2] || { });
 
     source = $(source);
     var p = Element.viewportOffset(source);
 
     element = $(element);
     var delta = [0, 0];
     var parent = null;
     if (Element.getStyle(element, 'position') == 'absolute') {
       parent = Element.getOffsetParent(element);
       delta = Element.viewportOffset(parent);
     }
 
     if (parent == document.body) {
       delta[0] -= document.body.offsetLeft;
       delta[1] -= document.body.offsetTop;
     }
 
     if (options.setLeft)   element.style.left  = (p[0] - delta[0] + options.offsetLeft) + 'px';
     if (options.setTop)    element.style.top   = (p[1] - delta[1] + options.offsetTop) + 'px';
     if (options.setWidth)  element.style.width = source.offsetWidth + 'px';
     if (options.setHeight) element.style.height = source.offsetHeight + 'px';
     return element;
   }
 };
 
 Object.extend(Element.Methods, {
   getElementsBySelector: Element.Methods.select,
 
   childElements: Element.Methods.immediateDescendants
 });
 
 Element._attributeTranslations = {
   write: {
     names: {
       className: 'class',
       htmlFor:   'for'
     },
     values: { }
   }
 };
 
 if (Prototype.Browser.Opera) {
   Element.Methods.getStyle = Element.Methods.getStyle.wrap(
     function(proceed, element, style) {
       switch (style) {
         case 'left': case 'top': case 'right': case 'bottom':
           if (proceed(element, 'position') === 'static') return null;
         case 'height': case 'width':
           if (!Element.visible(element)) return null;
 
           var dim = parseInt(proceed(element, style), 10);
 
           if (dim !== element['offset' + style.capitalize()])
             return dim + 'px';
 
           var properties;
           if (style === 'height') {
             properties = ['border-top-width', 'padding-top',
              'padding-bottom', 'border-bottom-width'];
           }
           else {
             properties = ['border-left-width', 'padding-left',
              'padding-right', 'border-right-width'];
           }
           return properties.inject(dim, function(memo, property) {
             var val = proceed(element, property);
             return val === null ? memo : memo - parseInt(val, 10);
           }) + 'px';
         default: return proceed(element, style);
       }
     }
   );
 
   Element.Methods.readAttribute = Element.Methods.readAttribute.wrap(
     function(proceed, element, attribute) {
       if (attribute === 'title') return element.title;
       return proceed(element, attribute);
     }
   );
 }
 
 else if (Prototype.Browser.IE) {
   Element.Methods.getOffsetParent = Element.Methods.getOffsetParent.wrap(
     function(proceed, element) {
       element = $(element);
       try { element.offsetParent }
       catch(e) { return $(document.body) }
       var position = element.getStyle('position');
       if (position !== 'static') return proceed(element);
       element.setStyle({ position: 'relative' });
       var value = proceed(element);
       element.setStyle({ position: position });
       return value;
     }
   );
 
   $w('positionedOffset viewportOffset').each(function(method) {
     Element.Methods[method] = Element.Methods[method].wrap(
       function(proceed, element) {
         element = $(element);
         try { element.offsetParent }
         catch(e) { return Element._returnOffset(0,0) }
         var position = element.getStyle('position');
         if (position !== 'static') return proceed(element);
         var offsetParent = element.getOffsetParent();
         if (offsetParent && offsetParent.getStyle('position') === 'fixed')
           offsetParent.setStyle({ zoom: 1 });
         element.setStyle({ position: 'relative' });
         var value = proceed(element);
         element.setStyle({ position: position });
         return value;
       }
     );
   });
 
   Element.Methods.cumulativeOffset = Element.Methods.cumulativeOffset.wrap(
     function(proceed, element) {
       try { element.offsetParent }
       catch(e) { return Element._returnOffset(0,0) }
       return proceed(element);
     }
   );
 
   Element.Methods.getStyle = function(element, style) {
     element = $(element);
     style = (style == 'float' || style == 'cssFloat') ? 'styleFloat' : style.camelize();
     var value = element.style[style];
     if (!value && element.currentStyle) value = element.currentStyle[style];
 
     if (style == 'opacity') {
       if (value = (element.getStyle('filter') || '').match(/alpha\(opacity=(.*)\)/))
         if (value[1]) return parseFloat(value[1]) / 100;
       return 1.0;
     }
 
     if (value == 'auto') {
       if ((style == 'width' || style == 'height') && (element.getStyle('display') != 'none'))
         return element['offset' + style.capitalize()] + 'px';
       return null;
     }
     return value;
   };
 
   Element.Methods.setOpacity = function(element, value) {
     function stripAlpha(filter){
       return filter.replace(/alpha\([^\)]*\)/gi,'');
     }
     element = $(element);
     var currentStyle = element.currentStyle;
     if ((currentStyle && !currentStyle.hasLayout) ||
       (!currentStyle && element.style.zoom == 'normal'))
         element.style.zoom = 1;
 
     var filter = element.getStyle('filter'), style = element.style;
     if (value == 1 || value === '') {
       (filter = stripAlpha(filter)) ?
         style.filter = filter : style.removeAttribute('filter');
       return element;
     } else if (value < 0.00001) value = 0;
     style.filter = stripAlpha(filter) +
       'alpha(opacity=' + (value * 100) + ')';
     return element;
   };
 
   Element._attributeTranslations = (function(){
 
     var classProp = 'className';
     var forProp = 'for';
 
     var el = document.createElement('div');
 
     el.setAttribute(classProp, 'x');
 
     if (el.className !== 'x') {
       el.setAttribute('class', 'x');
       if (el.className === 'x') {
         classProp = 'class';
       }
     }
     el = null;
 
     el = document.createElement('label');
     el.setAttribute(forProp, 'x');
     if (el.htmlFor !== 'x') {
       el.setAttribute('htmlFor', 'x');
       if (el.htmlFor === 'x') {
         forProp = 'htmlFor';
       }
     }
     el = null;
 
     return {
       read: {
         names: {
           'class':      classProp,
           'className':  classProp,
           'for':        forProp,
           'htmlFor':    forProp
         },
         values: {
           _getAttr: function(element, attribute) {
             return element.getAttribute(attribute);
           },
           _getAttr2: function(element, attribute) {
             return element.getAttribute(attribute, 2);
           },
           _getAttrNode: function(element, attribute) {
             var node = element.getAttributeNode(attribute);
             return node ? node.value : "";
           },
           _getEv: (function(){
 
             var el = document.createElement('div');
             el.onclick = Prototype.emptyFunction;
             var value = el.getAttribute('onclick');
             var f;
 
             if (String(value).indexOf('{') > -1) {
               f = function(element, attribute) {
                 attribute = element.getAttribute(attribute);
                 if (!attribute) return null;
                 attribute = attribute.toString();
                 attribute = attribute.split('{')[1];
                 attribute = attribute.split('}')[0];
                 return attribute.strip();
               };
             }
             else if (value === '') {
               f = function(element, attribute) {
                 attribute = element.getAttribute(attribute);
                 if (!attribute) return null;
                 return attribute.strip();
               };
             }
             el = null;
             return f;
           })(),
           _flag: function(element, attribute) {
             return $(element).hasAttribute(attribute) ? attribute : null;
           },
           style: function(element) {
             return element.style.cssText.toLowerCase();
           },
           title: function(element) {
             return element.title;
           }
         }
       }
     }
   })();
 
   Element._attributeTranslations.write = {
     names: Object.extend({
       cellpadding: 'cellPadding',
       cellspacing: 'cellSpacing'
     }, Element._attributeTranslations.read.names),
     values: {
       checked: function(element, value) {
         element.checked = !!value;
       },
 
       style: function(element, value) {
         element.style.cssText = value ? value : '';
       }
     }
   };
 
   Element._attributeTranslations.has = {};
 
   $w('colSpan rowSpan vAlign dateTime accessKey tabIndex ' +
       'encType maxLength readOnly longDesc frameBorder').each(function(attr) {
     Element._attributeTranslations.write.names[attr.toLowerCase()] = attr;
     Element._attributeTranslations.has[attr.toLowerCase()] = attr;
   });
 
   (function(v) {
     Object.extend(v, {
       href:        v._getAttr2,
       src:         v._getAttr2,
       type:        v._getAttr,
       action:      v._getAttrNode,
       disabled:    v._flag,
       checked:     v._flag,
       readonly:    v._flag,
       multiple:    v._flag,
       onload:      v._getEv,
       onunload:    v._getEv,
       onclick:     v._getEv,
       ondblclick:  v._getEv,
       onmousedown: v._getEv,
       onmouseup:   v._getEv,
       onmouseover: v._getEv,
       onmousemove: v._getEv,
       onmouseout:  v._getEv,
       onfocus:     v._getEv,
       onblur:      v._getEv,
       onkeypress:  v._getEv,
       onkeydown:   v._getEv,
       onkeyup:     v._getEv,
       onsubmit:    v._getEv,
       onreset:     v._getEv,
       onselect:    v._getEv,
       onchange:    v._getEv
     });
   })(Element._attributeTranslations.read.values);
 
   if (Prototype.BrowserFeatures.ElementExtensions) {
     (function() {
       function _descendants(element) {
         var nodes = element.getElementsByTagName('*'), results = [];
         for (var i = 0, node; node = nodes[i]; i++)
           if (node.tagName !== "!") // Filter out comment nodes.
             results.push(node);
         return results;
       }
 
       Element.Methods.down = function(element, expression, index) {
         element = $(element);
         if (arguments.length == 1) return element.firstDescendant();
         return Object.isNumber(expression) ? _descendants(element)[expression] :
           Element.select(element, expression)[index || 0];
       }
     })();
   }
 
 }
 
 else if (Prototype.Browser.Gecko && /rv:1\.8\.0/.test(navigator.userAgent)) {
   Element.Methods.setOpacity = function(element, value) {
     element = $(element);
     element.style.opacity = (value == 1) ? 0.999999 :
       (value === '') ? '' : (value < 0.00001) ? 0 : value;
     return element;
   };
 }
 
 else if (Prototype.Browser.WebKit) {
   Element.Methods.setOpacity = function(element, value) {
     element = $(element);
     element.style.opacity = (value == 1 || value === '') ? '' :
       (value < 0.00001) ? 0 : value;
 
     if (value == 1)
       if(element.tagName.toUpperCase() == 'IMG' && element.width) {
         element.width++; element.width--;
       } else try {
         var n = document.createTextNode(' ');
         element.appendChild(n);
         element.removeChild(n);
       } catch (e) { }
 
     return element;
   };
 
   Element.Methods.cumulativeOffset = function(element) {
     var valueT = 0, valueL = 0;
     do {
       valueT += element.offsetTop  || 0;
       valueL += element.offsetLeft || 0;
       if (element.offsetParent == document.body)
         if (Element.getStyle(element, 'position') == 'absolute') break;
 
       element = element.offsetParent;
     } while (element);
 
     return Element._returnOffset(valueL, valueT);
   };
 }
 
 if ('outerHTML' in document.documentElement) {
   Element.Methods.replace = function(element, content) {
     element = $(element);
 
     if (content && content.toElement) content = content.toElement();
     if (Object.isElement(content)) {
       element.parentNode.replaceChild(content, element);
       return element;
     }
 
     content = Object.toHTML(content);
     var parent = element.parentNode, tagName = parent.tagName.toUpperCase();
 
     if (Element._insertionTranslations.tags[tagName]) {
       var nextSibling = element.next();
       var fragments = Element._getContentFromAnonymousElement(tagName, content.stripScripts());
       parent.removeChild(element);
       if (nextSibling)
         fragments.each(function(node) { parent.insertBefore(node, nextSibling) });
       else
         fragments.each(function(node) { parent.appendChild(node) });
     }
     else element.outerHTML = content.stripScripts();
 
     content.evalScripts.bind(content).defer();
     return element;
   };
 }
 
 Element._returnOffset = function(l, t) {
   var result = [l, t];
   result.left = l;
   result.top = t;
   return result;
 };
 
 Element._getContentFromAnonymousElement = function(tagName, html) {
   var div = new Element('div'), t = Element._insertionTranslations.tags[tagName];
   if (t) {
     div.innerHTML = t[0] + html + t[1];
     t[2].times(function() { div = div.firstChild });
   } else div.innerHTML = html;
   return $A(div.childNodes);
 };
 
 Element._insertionTranslations = {
   before: function(element, node) {
     element.parentNode.insertBefore(node, element);
   },
   top: function(element, node) {
     element.insertBefore(node, element.firstChild);
   },
   bottom: function(element, node) {
     element.appendChild(node);
   },
   after: function(element, node) {
     element.parentNode.insertBefore(node, element.nextSibling);
   },
   tags: {
     TABLE:  ['<table>',                '</table>',                   1],
     TBODY:  ['<table><tbody>',         '</tbody></table>',           2],
     TR:     ['<table><tbody><tr>',     '</tr></tbody></table>',      3],
     TD:     ['<table><tbody><tr><td>', '</td></tr></tbody></table>', 4],
     SELECT: ['<select>',               '</select>',                  1]
   }
 };
 
 (function() {
   var tags = Element._insertionTranslations.tags;
   Object.extend(tags, {
     THEAD: tags.TBODY,
     TFOOT: tags.TBODY,
     TH:    tags.TD
   });
 })();
 
 Element.Methods.Simulated = {
   hasAttribute: function(element, attribute) {
     attribute = Element._attributeTranslations.has[attribute] || attribute;
     var node = $(element).getAttributeNode(attribute);
     return !!(node && node.specified);
   }
 };
 
 Element.Methods.ByTag = { };
 
 Object.extend(Element, Element.Methods);
 
 (function(div) {
 
   if (!Prototype.BrowserFeatures.ElementExtensions && div['__proto__']) {
     window.HTMLElement = { };
     window.HTMLElement.prototype = div['__proto__'];
     Prototype.BrowserFeatures.ElementExtensions = true;
   }
 
   div = null;
 
 })(document.createElement('div'))
 
 Element.extend = (function() {
 
   function checkDeficiency(tagName) {
     if (typeof window.Element != 'undefined') {
       var proto = window.Element.prototype;
       if (proto) {
         var id = '_' + (Math.random()+'').slice(2);
         var el = document.createElement(tagName);
         proto[id] = 'x';
         var isBuggy = (el[id] !== 'x');
         delete proto[id];
         el = null;
         return isBuggy;
       }
     }
     return false;
   }
 
   function extendElementWith(element, methods) {
     for (var property in methods) {
       var value = methods[property];
       if (Object.isFunction(value) && !(property in element))
         element[property] = value.methodize();
     }
   }
 
   var HTMLOBJECTELEMENT_PROTOTYPE_BUGGY = checkDeficiency('object');
 
   if (Prototype.BrowserFeatures.SpecificElementExtensions) {
     if (HTMLOBJECTELEMENT_PROTOTYPE_BUGGY) {
       return function(element) {
         if (element && typeof element._extendedByPrototype == 'undefined') {
           var t = element.tagName;
           if (t && (/^(?:object|applet|embed)$/i.test(t))) {
             extendElementWith(element, Element.Methods);
             extendElementWith(element, Element.Methods.Simulated);
             extendElementWith(element, Element.Methods.ByTag[t.toUpperCase()]);
           }
         }
         return element;
       }
     }
     return Prototype.K;
   }
 
   var Methods = { }, ByTag = Element.Methods.ByTag;
 
   var extend = Object.extend(function(element) {
     if (!element || typeof element._extendedByPrototype != 'undefined' ||
         element.nodeType != 1 || element == window) return element;
 
     var methods = Object.clone(Methods),
         tagName = element.tagName.toUpperCase();
 
     if (ByTag[tagName]) Object.extend(methods, ByTag[tagName]);
 
     extendElementWith(element, methods);
 
     element._extendedByPrototype = Prototype.emptyFunction;
     return element;
 
   }, {
     refresh: function() {
       if (!Prototype.BrowserFeatures.ElementExtensions) {
         Object.extend(Methods, Element.Methods);
         Object.extend(Methods, Element.Methods.Simulated);
       }
     }
   });
 
   extend.refresh();
   return extend;
 })();
 
 Element.hasAttribute = function(element, attribute) {
   if (element.hasAttribute) return element.hasAttribute(attribute);
   return Element.Methods.Simulated.hasAttribute(element, attribute);
 };
 
 Element.addMethods = function(methods) {
   var F = Prototype.BrowserFeatures, T = Element.Methods.ByTag;
 
   if (!methods) {
     Object.extend(Form, Form.Methods);
     Object.extend(Form.Element, Form.Element.Methods);
     Object.extend(Element.Methods.ByTag, {
       "FORM":     Object.clone(Form.Methods),
       "INPUT":    Object.clone(Form.Element.Methods),
       "SELECT":   Object.clone(Form.Element.Methods),
       "TEXTAREA": Object.clone(Form.Element.Methods)
     });
   }
 
   if (arguments.length == 2) {
     var tagName = methods;
     methods = arguments[1];
   }
 
   if (!tagName) Object.extend(Element.Methods, methods || { });
   else {
     if (Object.isArray(tagName)) tagName.each(extend);
     else extend(tagName);
   }
 
   function extend(tagName) {
     tagName = tagName.toUpperCase();
     if (!Element.Methods.ByTag[tagName])
       Element.Methods.ByTag[tagName] = { };
     Object.extend(Element.Methods.ByTag[tagName], methods);
   }
 
   function copy(methods, destination, onlyIfAbsent) {
     onlyIfAbsent = onlyIfAbsent || false;
     for (var property in methods) {
       var value = methods[property];
       if (!Object.isFunction(value)) continue;
       if (!onlyIfAbsent || !(property in destination))
         destination[property] = value.methodize();
     }
   }
 
   function findDOMClass(tagName) {
     var klass;
     var trans = {
       "OPTGROUP": "OptGroup", "TEXTAREA": "TextArea", "P": "Paragraph",
       "FIELDSET": "FieldSet", "UL": "UList", "OL": "OList", "DL": "DList",
       "DIR": "Directory", "H1": "Heading", "H2": "Heading", "H3": "Heading",
       "H4": "Heading", "H5": "Heading", "H6": "Heading", "Q": "Quote",
       "INS": "Mod", "DEL": "Mod", "A": "Anchor", "IMG": "Image", "CAPTION":
       "TableCaption", "COL": "TableCol", "COLGROUP": "TableCol", "THEAD":
       "TableSection", "TFOOT": "TableSection", "TBODY": "TableSection", "TR":
       "TableRow", "TH": "TableCell", "TD": "TableCell", "FRAMESET":
       "FrameSet", "IFRAME": "IFrame"
     };
     if (trans[tagName]) klass = 'HTML' + trans[tagName] + 'Element';
     if (window[klass]) return window[klass];
     klass = 'HTML' + tagName + 'Element';
     if (window[klass]) return window[klass];
     klass = 'HTML' + tagName.capitalize() + 'Element';
     if (window[klass]) return window[klass];
 
     var element = document.createElement(tagName);
     var proto = element['__proto__'] || element.constructor.prototype;
     element = null;
     return proto;
   }
 
   var elementPrototype = window.HTMLElement ? HTMLElement.prototype :
    Element.prototype;
 
   if (F.ElementExtensions) {
     copy(Element.Methods, elementPrototype);
     copy(Element.Methods.Simulated, elementPrototype, true);
   }
 
   if (F.SpecificElementExtensions) {
     for (var tag in Element.Methods.ByTag) {
       var klass = findDOMClass(tag);
       if (Object.isUndefined(klass)) continue;
       copy(T[tag], klass.prototype);
     }
   }
 
   Object.extend(Element, Element.Methods);
   delete Element.ByTag;
 
   if (Element.extend.refresh) Element.extend.refresh();
   Element.cache = { };
 };
 
 
 document.viewport = {
 
   getDimensions: function() {
     return { width: this.getWidth(), height: this.getHeight() };
   },
 
   getScrollOffsets: function() {
     return Element._returnOffset(
       window.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft,
       window.pageYOffset || document.documentElement.scrollTop  || document.body.scrollTop);
   }
 };
 
 (function(viewport) {
   var B = Prototype.Browser, doc = document, element, property = {};
 
   function getRootElement() {
     if (B.WebKit && !doc.evaluate)
       return document;
 
     if (B.Opera && window.parseFloat(window.opera.version()) < 9.5)
       return document.body;
 
     return document.documentElement;
   }
 
   function define(D) {
     if (!element) element = getRootElement();
 
     property[D] = 'client' + D;
 
     viewport['get' + D] = function() { return element[property[D]] };
     return viewport['get' + D]();
   }
 
   viewport.getWidth  = define.curry('Width');
 
   viewport.getHeight = define.curry('Height');
 })(document.viewport);
 
 
 Element.Storage = {
   UID: 1
 };
 
 Element.addMethods({
   getStorage: function(element) {
     if (!(element = $(element))) return;
 
     var uid;
     if (element === window) {
       uid = 0;
     } else {
       if (typeof element._prototypeUID === "undefined")
         element._prototypeUID = [Element.Storage.UID++];
       uid = element._prototypeUID[0];
     }
 
     if (!Element.Storage[uid])
       Element.Storage[uid] = $H();
 
     return Element.Storage[uid];
   },
 
   store: function(element, key, value) {
     if (!(element = $(element))) return;
 
     if (arguments.length === 2) {
       Element.getStorage(element).update(key);
     } else {
       Element.getStorage(element).set(key, value);
     }
 
     return element;
   },
 
   retrieve: function(element, key, defaultValue) {
     if (!(element = $(element))) return;
     var hash = Element.getStorage(element), value = hash.get(key);
 
     if (Object.isUndefined(value)) {
       hash.set(key, defaultValue);
       value = defaultValue;
     }
 
     return value;
   },
 
   clone: function(element, deep) {
     if (!(element = $(element))) return;
     var clone = element.cloneNode(deep);
     clone._prototypeUID = void 0;
     if (deep) {
       var descendants = Element.select(clone, '*'),
           i = descendants.length;
       while (i--) {
         descendants[i]._prototypeUID = void 0;
       }
     }
     return Element.extend(clone);
   }
 });
 /* Portions of the Selector class are derived from Jack Slocum's DomQuery,
  * part of YUI-Ext version 0.40, distributed under the terms of an MIT-style
  * license.  Please see http://www.yui-ext.com/ for more information. */
 
 var Selector = Class.create({
   initialize: function(expression) {
     this.expression = expression.strip();
 
     if (this.shouldUseSelectorsAPI()) {
       this.mode = 'selectorsAPI';
     } else if (this.shouldUseXPath()) {
       this.mode = 'xpath';
       this.compileXPathMatcher();
     } else {
       this.mode = "normal";
       this.compileMatcher();
     }
 
   },
 
   shouldUseXPath: (function() {
 
     var IS_DESCENDANT_SELECTOR_BUGGY = (function(){
       var isBuggy = false;
       if (document.evaluate && window.XPathResult) {
         var el = document.createElement('div');
         el.innerHTML = '<ul><li></li></ul><div><ul><li></li></ul></div>';
 
         var xpath = ".//*[local-name()='ul' or local-name()='UL']" +
           "//*[local-name()='li' or local-name()='LI']";
 
         var result = document.evaluate(xpath, el, null,
           XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
 
         isBuggy = (result.snapshotLength !== 2);
         el = null;
       }
       return isBuggy;
     })();
 
     return function() {
       if (!Prototype.BrowserFeatures.XPath) return false;
 
       var e = this.expression;
 
       if (Prototype.Browser.WebKit &&
        (e.include("-of-type") || e.include(":empty")))
         return false;
 
       if ((/(\[[\w-]*?:|:checked)/).test(e))
         return false;
 
       if (IS_DESCENDANT_SELECTOR_BUGGY) return false;
 
       return true;
     }
 
   })(),
 
   shouldUseSelectorsAPI: function() {
     if (!Prototype.BrowserFeatures.SelectorsAPI) return false;
 
     if (Selector.CASE_INSENSITIVE_CLASS_NAMES) return false;
 
     if (!Selector._div) Selector._div = new Element('div');
 
     try {
       Selector._div.querySelector(this.expression);
     } catch(e) {
       return false;
     }
 
     return true;
   },
 
   compileMatcher: function() {
     var e = this.expression, ps = Selector.patterns, h = Selector.handlers,
         c = Selector.criteria, le, p, m, len = ps.length, name;
 
     if (Selector._cache[e]) {
       this.matcher = Selector._cache[e];
       return;
     }
 
     this.matcher = ["this.matcher = function(root) {",
                     "var r = root, h = Selector.handlers, c = false, n;"];
 
     while (e && le != e && (/\S/).test(e)) {
       le = e;
       for (var i = 0; i<len; i++) {
         p = ps[i].re;
         name = ps[i].name;
         if (m = e.match(p)) {
           this.matcher.push(Object.isFunction(c[name]) ? c[name](m) :
             new Template(c[name]).evaluate(m));
           e = e.replace(m[0], '');
           break;
         }
       }
     }
 
     this.matcher.push("return h.unique(n);\n}");
     eval(this.matcher.join('\n'));
     Selector._cache[this.expression] = this.matcher;
   },
 
   compileXPathMatcher: function() {
     var e = this.expression, ps = Selector.patterns,
         x = Selector.xpath, le, m, len = ps.length, name;
 
     if (Selector._cache[e]) {
       this.xpath = Selector._cache[e]; return;
     }
 
     this.matcher = ['.//*'];
     while (e && le != e && (/\S/).test(e)) {
       le = e;
       for (var i = 0; i<len; i++) {
         name = ps[i].name;
         if (m = e.match(ps[i].re)) {
           this.matcher.push(Object.isFunction(x[name]) ? x[name](m) :
             new Template(x[name]).evaluate(m));
           e = e.replace(m[0], '');
           break;
         }
       }
     }
 
     this.xpath = this.matcher.join('');
     Selector._cache[this.expression] = this.xpath;
   },
 
   findElements: function(root) {
     root = root || document;
     var e = this.expression, results;
 
     switch (this.mode) {
       case 'selectorsAPI':
         if (root !== document) {
           var oldId = root.id, id = $(root).identify();
           id = id.replace(/([\.:])/g, "\\$1");
           e = "#" + id + " " + e;
         }
 
         results = $A(root.querySelectorAll(e)).map(Element.extend);
         root.id = oldId;
 
         return results;
       case 'xpath':
         return document._getElementsByXPath(this.xpath, root);
       default:
        return this.matcher(root);
     }
   },
 
   match: function(element) {
     this.tokens = [];
 
     var e = this.expression, ps = Selector.patterns, as = Selector.assertions;
     var le, p, m, len = ps.length, name;
 
     while (e && le !== e && (/\S/).test(e)) {
       le = e;
       for (var i = 0; i<len; i++) {
         p = ps[i].re;
         name = ps[i].name;
         if (m = e.match(p)) {
           if (as[name]) {
             this.tokens.push([name, Object.clone(m)]);
             e = e.replace(m[0], '');
           } else {
             return this.findElements(document).include(element);
           }
         }
       }
     }
 
     var match = true, name, matches;
     for (var i = 0, token; token = this.tokens[i]; i++) {
       name = token[0], matches = token[1];
       if (!Selector.assertions[name](element, matches)) {
         match = false; break;
       }
     }
 
     return match;
   },
 
   toString: function() {
     return this.expression;
   },
 
   inspect: function() {
     return "#<Selector:" + this.expression.inspect() + ">";
   }
 });
 
 if (Prototype.BrowserFeatures.SelectorsAPI &&
  document.compatMode === 'BackCompat') {
   Selector.CASE_INSENSITIVE_CLASS_NAMES = (function(){
     var div = document.createElement('div'),
      span = document.createElement('span');
 
     div.id = "prototype_test_id";
     span.className = 'Test';
     div.appendChild(span);
     var isIgnored = (div.querySelector('#prototype_test_id .test') !== null);
     div = span = null;
     return isIgnored;
   })();
 }
 
 Object.extend(Selector, {
   _cache: { },
 
   xpath: {
     descendant:   "//*",
     child:        "/*",
     adjacent:     "/following-sibling::*[1]",
     laterSibling: '/following-sibling::*',
     tagName:      function(m) {
       if (m[1] == '*') return '';
       return "[local-name()='" + m[1].toLowerCase() +
              "' or local-name()='" + m[1].toUpperCase() + "']";
     },
     className:    "[contains(concat(' ', @class, ' '), ' #{1} ')]",
     id:           "[@id='#{1}']",
     attrPresence: function(m) {
       m[1] = m[1].toLowerCase();
       return new Template("[@#{1}]").evaluate(m);
     },
     attr: function(m) {
       m[1] = m[1].toLowerCase();
       m[3] = m[5] || m[6];
       return new Template(Selector.xpath.operators[m[2]]).evaluate(m);
     },
     pseudo: function(m) {
       var h = Selector.xpath.pseudos[m[1]];
       if (!h) return '';
       if (Object.isFunction(h)) return h(m);
       return new Template(Selector.xpath.pseudos[m[1]]).evaluate(m);
     },
     operators: {
       '=':  "[@#{1}='#{3}']",
       '!=': "[@#{1}!='#{3}']",
       '^=': "[starts-with(@#{1}, '#{3}')]",
       '$=': "[substring(@#{1}, (string-length(@#{1}) - string-length('#{3}') + 1))='#{3}']",
       '*=': "[contains(@#{1}, '#{3}')]",
       '~=': "[contains(concat(' ', @#{1}, ' '), ' #{3} ')]",
       '|=': "[contains(concat('-', @#{1}, '-'), '-#{3}-')]"
     },
     pseudos: {
       'first-child': '[not(preceding-sibling::*)]',
       'last-child':  '[not(following-sibling::*)]',
       'only-child':  '[not(preceding-sibling::* or following-sibling::*)]',
       'empty':       "[count(*) = 0 and (count(text()) = 0)]",
       'checked':     "[@checked]",
       'disabled':    "[(@disabled) and (@type!='hidden')]",
       'enabled':     "[not(@disabled) and (@type!='hidden')]",
       'not': function(m) {
         var e = m[6], p = Selector.patterns,
             x = Selector.xpath, le, v, len = p.length, name;
 
         var exclusion = [];
         while (e && le != e && (/\S/).test(e)) {
           le = e;
           for (var i = 0; i<len; i++) {
             name = p[i].name
             if (m = e.match(p[i].re)) {
               v = Object.isFunction(x[name]) ? x[name](m) : new Template(x[name]).evaluate(m);
               exclusion.push("(" + v.substring(1, v.length - 1) + ")");
               e = e.replace(m[0], '');
               break;
             }
           }
         }
         return "[not(" + exclusion.join(" and ") + ")]";
       },
       'nth-child':      function(m) {
         return Selector.xpath.pseudos.nth("(count(./preceding-sibling::*) + 1) ", m);
       },
       'nth-last-child': function(m) {
         return Selector.xpath.pseudos.nth("(count(./following-sibling::*) + 1) ", m);
       },
       'nth-of-type':    function(m) {
         return Selector.xpath.pseudos.nth("position() ", m);
       },
       'nth-last-of-type': function(m) {
         return Selector.xpath.pseudos.nth("(last() + 1 - position()) ", m);
       },
       'first-of-type':  function(m) {
         m[6] = "1"; return Selector.xpath.pseudos['nth-of-type'](m);
       },
       'last-of-type':   function(m) {
         m[6] = "1"; return Selector.xpath.pseudos['nth-last-of-type'](m);
       },
       'only-of-type':   function(m) {
         var p = Selector.xpath.pseudos; return p['first-of-type'](m) + p['last-of-type'](m);
       },
       nth: function(fragment, m) {
         var mm, formula = m[6], predicate;
         if (formula == 'even') formula = '2n+0';
         if (formula == 'odd')  formula = '2n+1';
         if (mm = formula.match(/^(\d+)$/)) // digit only
           return '[' + fragment + "= " + mm[1] + ']';
         if (mm = formula.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b
           if (mm[1] == "-") mm[1] = -1;
           var a = mm[1] ? Number(mm[1]) : 1;
           var b = mm[2] ? Number(mm[2]) : 0;
           predicate = "[((#{fragment} - #{b}) mod #{a} = 0) and " +
           "((#{fragment} - #{b}) div #{a} >= 0)]";
           return new Template(predicate).evaluate({
             fragment: fragment, a: a, b: b });
         }
       }
     }
   },
 
   criteria: {
     tagName:      'n = h.tagName(n, r, "#{1}", c);      c = false;',
     className:    'n = h.className(n, r, "#{1}", c);    c = false;',
     id:           'n = h.id(n, r, "#{1}", c);           c = false;',
     attrPresence: 'n = h.attrPresence(n, r, "#{1}", c); c = false;',
     attr: function(m) {
       m[3] = (m[5] || m[6]);
       return new Template('n = h.attr(n, r, "#{1}", "#{3}", "#{2}", c); c = false;').evaluate(m);
     },
     pseudo: function(m) {
       if (m[6]) m[6] = m[6].replace(/"/g, '\\"');
       return new Template('n = h.pseudo(n, "#{1}", "#{6}", r, c); c = false;').evaluate(m);
     },
     descendant:   'c = "descendant";',
     child:        'c = "child";',
     adjacent:     'c = "adjacent";',
     laterSibling: 'c = "laterSibling";'
   },
 
   patterns: [
     { name: 'laterSibling', re: /^\s*~\s*/ },
     { name: 'child',        re: /^\s*>\s*/ },
     { name: 'adjacent',     re: /^\s*\+\s*/ },
     { name: 'descendant',   re: /^\s/ },
 
     { name: 'tagName',      re: /^\s*(\*|[\w\-]+)(\b|$)?/ },
     { name: 'id',           re: /^#([\w\-\*]+)(\b|$)/ },
     { name: 'className',    re: /^\.([\w\-\*]+)(\b|$)/ },
     { name: 'pseudo',       re: /^:((first|last|nth|nth-last|only)(-child|-of-type)|empty|checked|(en|dis)abled|not)(\((.*?)\))?(\b|$|(?=\s|[:+~>]))/ },
     { name: 'attrPresence', re: /^\[((?:[\w-]+:)?[\w-]+)\]/ },
     { name: 'attr',         re: /\[((?:[\w-]*:)?[\w-]+)\s*(?:([!^$*~|]?=)\s*((['"])([^\4]*?)\4|([^'"][^\]]*?)))?\]/ }
   ],
 
   assertions: {
     tagName: function(element, matches) {
       return matches[1].toUpperCase() == element.tagName.toUpperCase();
     },
 
     className: function(element, matches) {
       return Element.hasClassName(element, matches[1]);
     },
 
     id: function(element, matches) {
       return element.id === matches[1];
     },
 
     attrPresence: function(element, matches) {
       return Element.hasAttribute(element, matches[1]);
     },
 
     attr: function(element, matches) {
       var nodeValue = Element.readAttribute(element, matches[1]);
       return nodeValue && Selector.operators[matches[2]](nodeValue, matches[5] || matches[6]);
     }
   },
 
   handlers: {
     concat: function(a, b) {
       for (var i = 0, node; node = b[i]; i++)
         a.push(node);
       return a;
     },
 
     mark: function(nodes) {
       var _true = Prototype.emptyFunction;
       for (var i = 0, node; node = nodes[i]; i++)
         node._countedByPrototype = _true;
       return nodes;
     },
 
     unmark: (function(){
 
       var PROPERTIES_ATTRIBUTES_MAP = (function(){
         var el = document.createElement('div'),
             isBuggy = false,
             propName = '_countedByPrototype',
             value = 'x'
         el[propName] = value;
         isBuggy = (el.getAttribute(propName) === value);
         el = null;
         return isBuggy;
       })();
 
       return PROPERTIES_ATTRIBUTES_MAP ?
         function(nodes) {
           for (var i = 0, node; node = nodes[i]; i++)
             node.removeAttribute('_countedByPrototype');
           return nodes;
         } :
         function(nodes) {
           for (var i = 0, node; node = nodes[i]; i++)
             node._countedByPrototype = void 0;
           return nodes;
         }
     })(),
 
     index: function(parentNode, reverse, ofType) {
       parentNode._countedByPrototype = Prototype.emptyFunction;
       if (reverse) {
         for (var nodes = parentNode.childNodes, i = nodes.length - 1, j = 1; i >= 0; i--) {
           var node = nodes[i];
           if (node.nodeType == 1 && (!ofType || node._countedByPrototype)) node.nodeIndex = j++;
         }
       } else {
         for (var i = 0, j = 1, nodes = parentNode.childNodes; node = nodes[i]; i++)
           if (node.nodeType == 1 && (!ofType || node._countedByPrototype)) node.nodeIndex = j++;
       }
     },
 
     unique: function(nodes) {
       if (nodes.length == 0) return nodes;
       var results = [], n;
       for (var i = 0, l = nodes.length; i < l; i++)
         if (typeof (n = nodes[i])._countedByPrototype == 'undefined') {
           n._countedByPrototype = Prototype.emptyFunction;
           results.push(Element.extend(n));
         }
       return Selector.handlers.unmark(results);
     },
 
     descendant: function(nodes) {
       var h = Selector.handlers;
       for (var i = 0, results = [], node; node = nodes[i]; i++)
         h.concat(results, node.getElementsByTagName('*'));
       return results;
     },
 
     child: function(nodes) {
       var h = Selector.handlers;
       for (var i = 0, results = [], node; node = nodes[i]; i++) {
         for (var j = 0, child; child = node.childNodes[j]; j++)
           if (child.nodeType == 1 && child.tagName != '!') results.push(child);
       }
       return results;
     },
 
     adjacent: function(nodes) {
       for (var i = 0, results = [], node; node = nodes[i]; i++) {
         var next = this.nextElementSibling(node);
         if (next) results.push(next);
       }
       return results;
     },
 
     laterSibling: function(nodes) {
       var h = Selector.handlers;
       for (var i = 0, results = [], node; node = nodes[i]; i++)
         h.concat(results, Element.nextSiblings(node));
       return results;
     },
 
     nextElementSibling: function(node) {
       while (node = node.nextSibling)
         if (node.nodeType == 1) return node;
       return null;
     },
 
     previousElementSibling: function(node) {
       while (node = node.previousSibling)
         if (node.nodeType == 1) return node;
       return null;
     },
 
     tagName: function(nodes, root, tagName, combinator) {
       var uTagName = tagName.toUpperCase();
       var results = [], h = Selector.handlers;
       if (nodes) {
         if (combinator) {
           if (combinator == "descendant") {
             for (var i = 0, node; node = nodes[i]; i++)
               h.concat(results, node.getElementsByTagName(tagName));
             return results;
           } else nodes = this[combinator](nodes);
           if (tagName == "*") return nodes;
         }
         for (var i = 0, node; node = nodes[i]; i++)
           if (node.tagName.toUpperCase() === uTagName) results.push(node);
         return results;
       } else return root.getElementsByTagName(tagName);
     },
 
     id: function(nodes, root, id, combinator) {
       var targetNode = $(id), h = Selector.handlers;
 
       if (root == document) {
         if (!targetNode) return [];
         if (!nodes) return [targetNode];
       } else {
         if (!root.sourceIndex || root.sourceIndex < 1) {
           var nodes = root.getElementsByTagName('*');
           for (var j = 0, node; node = nodes[j]; j++) {
             if (node.id === id) return [node];
           }
         }
       }
 
       if (nodes) {
         if (combinator) {
           if (combinator == 'child') {
             for (var i = 0, node; node = nodes[i]; i++)
               if (targetNode.parentNode == node) return [targetNode];
           } else if (combinator == 'descendant') {
             for (var i = 0, node; node = nodes[i]; i++)
               if (Element.descendantOf(targetNode, node)) return [targetNode];
           } else if (combinator == 'adjacent') {
             for (var i = 0, node; node = nodes[i]; i++)
               if (Selector.handlers.previousElementSibling(targetNode) == node)
                 return [targetNode];
           } else nodes = h[combinator](nodes);
         }
         for (var i = 0, node; node = nodes[i]; i++)
           if (node == targetNode) return [targetNode];
         return [];
       }
       return (targetNode && Element.descendantOf(targetNode, root)) ? [targetNode] : [];
     },
 
     className: function(nodes, root, className, combinator) {
       if (nodes && combinator) nodes = this[combinator](nodes);
       return Selector.handlers.byClassName(nodes, root, className);
     },
 
     byClassName: function(nodes, root, className) {
       if (!nodes) nodes = Selector.handlers.descendant([root]);
       var needle = ' ' + className + ' ';
       for (var i = 0, results = [], node, nodeClassName; node = nodes[i]; i++) {
         nodeClassName = node.className;
         if (nodeClassName.length == 0) continue;
         if (nodeClassName == className || (' ' + nodeClassName + ' ').include(needle))
           results.push(node);
       }
       return results;
     },
 
     attrPresence: function(nodes, root, attr, combinator) {
       if (!nodes) nodes = root.getElementsByTagName("*");
       if (nodes && combinator) nodes = this[combinator](nodes);
       var results = [];
       for (var i = 0, node; node = nodes[i]; i++)
         if (Element.hasAttribute(node, attr)) results.push(node);
       return results;
     },
 
     attr: function(nodes, root, attr, value, operator, combinator) {
       if (!nodes) nodes = root.getElementsByTagName("*");
       if (nodes && combinator) nodes = this[combinator](nodes);
       var handler = Selector.operators[operator], results = [];
       for (var i = 0, node; node = nodes[i]; i++) {
         var nodeValue = Element.readAttribute(node, attr);
         if (nodeValue === null) continue;
         if (handler(nodeValue, value)) results.push(node);
       }
       return results;
     },
 
     pseudo: function(nodes, name, value, root, combinator) {
       if (nodes && combinator) nodes = this[combinator](nodes);
       if (!nodes) nodes = root.getElementsByTagName("*");
       return Selector.pseudos[name](nodes, value, root);
     }
   },
 
   pseudos: {
     'first-child': function(nodes, value, root) {
       for (var i = 0, results = [], node; node = nodes[i]; i++) {
         if (Selector.handlers.previousElementSibling(node)) continue;
           results.push(node);
       }
       return results;
     },
     'last-child': function(nodes, value, root) {
       for (var i = 0, results = [], node; node = nodes[i]; i++) {
         if (Selector.handlers.nextElementSibling(node)) continue;
           results.push(node);
       }
       return results;
     },
     'only-child': function(nodes, value, root) {
       var h = Selector.handlers;
       for (var i = 0, results = [], node; node = nodes[i]; i++)
         if (!h.previousElementSibling(node) && !h.nextElementSibling(node))
           results.push(node);
       return results;
     },
     'nth-child':        function(nodes, formula, root) {
       return Selector.pseudos.nth(nodes, formula, root);
     },
     'nth-last-child':   function(nodes, formula, root) {
       return Selector.pseudos.nth(nodes, formula, root, true);
     },
     'nth-of-type':      function(nodes, formula, root) {
       return Selector.pseudos.nth(nodes, formula, root, false, true);
     },
     'nth-last-of-type': function(nodes, formula, root) {
       return Selector.pseudos.nth(nodes, formula, root, true, true);
     },
     'first-of-type':    function(nodes, formula, root) {
       return Selector.pseudos.nth(nodes, "1", root, false, true);
     },
     'last-of-type':     function(nodes, formula, root) {
       return Selector.pseudos.nth(nodes, "1", root, true, true);
     },
     'only-of-type':     function(nodes, formula, root) {
       var p = Selector.pseudos;
       return p['last-of-type'](p['first-of-type'](nodes, formula, root), formula, root);
     },
 
     getIndices: function(a, b, total) {
       if (a == 0) return b > 0 ? [b] : [];
       return $R(1, total).inject([], function(memo, i) {
         if (0 == (i - b) % a && (i - b) / a >= 0) memo.push(i);
         return memo;
       });
     },
 
     nth: function(nodes, formula, root, reverse, ofType) {
       if (nodes.length == 0) return [];
       if (formula == 'even') formula = '2n+0';
       if (formula == 'odd')  formula = '2n+1';
       var h = Selector.handlers, results = [], indexed = [], m;
       h.mark(nodes);
       for (var i = 0, node; node = nodes[i]; i++) {
         if (!node.parentNode._countedByPrototype) {
           h.index(node.parentNode, reverse, ofType);
           indexed.push(node.parentNode);
         }
       }
       if (formula.match(/^\d+$/)) { // just a number
         formula = Number(formula);
         for (var i = 0, node; node = nodes[i]; i++)
           if (node.nodeIndex == formula) results.push(node);
       } else if (m = formula.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b
         if (m[1] == "-") m[1] = -1;
         var a = m[1] ? Number(m[1]) : 1;
         var b = m[2] ? Number(m[2]) : 0;
         var indices = Selector.pseudos.getIndices(a, b, nodes.length);
         for (var i = 0, node, l = indices.length; node = nodes[i]; i++) {
           for (var j = 0; j < l; j++)
             if (node.nodeIndex == indices[j]) results.push(node);
         }
       }
       h.unmark(nodes);
       h.unmark(indexed);
       return results;
     },
 
     'empty': function(nodes, value, root) {
       for (var i = 0, results = [], node; node = nodes[i]; i++) {
         if (node.tagName == '!' || node.firstChild) continue;
         results.push(node);
       }
       return results;
     },
 
     'not': function(nodes, selector, root) {
       var h = Selector.handlers, selectorType, m;
       var exclusions = new Selector(selector).findElements(root);
       h.mark(exclusions);
       for (var i = 0, results = [], node; node = nodes[i]; i++)
         if (!node._countedByPrototype) results.push(node);
       h.unmark(exclusions);
       return results;
     },
 
     'enabled': function(nodes, value, root) {
       for (var i = 0, results = [], node; node = nodes[i]; i++)
         if (!node.disabled && (!node.type || node.type !== 'hidden'))
           results.push(node);
       return results;
     },
 
     'disabled': function(nodes, value, root) {
       for (var i = 0, results = [], node; node = nodes[i]; i++)
         if (node.disabled) results.push(node);
       return results;
     },
 
     'checked': function(nodes, value, root) {
       for (var i = 0, results = [], node; node = nodes[i]; i++)
         if (node.checked) results.push(node);
       return results;
     }
   },
 
   operators: {
     '=':  function(nv, v) { return nv == v; },
     '!=': function(nv, v) { return nv != v; },
     '^=': function(nv, v) { return nv == v || nv && nv.startsWith(v); },
     '$=': function(nv, v) { return nv == v || nv && nv.endsWith(v); },
     '*=': function(nv, v) { return nv == v || nv && nv.include(v); },
     '~=': function(nv, v) { return (' ' + nv + ' ').include(' ' + v + ' '); },
     '|=': function(nv, v) { return ('-' + (nv || "").toUpperCase() +
      '-').include('-' + (v || "").toUpperCase() + '-'); }
   },
 
   split: function(expression) {
     var expressions = [];
     expression.scan(/(([\w#:.~>+()\s-]+|\*|\[.*?\])+)\s*(,|$)/, function(m) {
       expressions.push(m[1].strip());
     });
     return expressions;
   },
 
   matchElements: function(elements, expression) {
     var matches = $$(expression), h = Selector.handlers;
     h.mark(matches);
     for (var i = 0, results = [], element; element = elements[i]; i++)
       if (element._countedByPrototype) results.push(element);
     h.unmark(matches);
     return results;
   },
 
   findElement: function(elements, expression, index) {
     if (Object.isNumber(expression)) {
       index = expression; expression = false;
     }
     return Selector.matchElements(elements, expression || '*')[index || 0];
   },
 
   findChildElements: function(element, expressions) {
     expressions = Selector.split(expressions.join(','));
     var results = [], h = Selector.handlers;
     for (var i = 0, l = expressions.length, selector; i < l; i++) {
       selector = new Selector(expressions[i].strip());
       h.concat(results, selector.findElements(element));
     }
     return (l > 1) ? h.unique(results) : results;
   }
 });
 
 if (Prototype.Browser.IE) {
   Object.extend(Selector.handlers, {
     concat: function(a, b) {
       for (var i = 0, node; node = b[i]; i++)
         if (node.tagName !== "!") a.push(node);
       return a;
     }
   });
 }
 
 function $$() {
   return Selector.findChildElements(document, $A(arguments));
 }
 
 var Form = {
   reset: function(form) {
     form = $(form);
     form.reset();
     return form;
   },
 
   serializeElements: function(elements, options) {
     if (typeof options != 'object') options = { hash: !!options };
     else if (Object.isUndefined(options.hash)) options.hash = true;
     var key, value, submitted = false, submit = options.submit;
 
     var data = elements.inject({ }, function(result, element) {
       if (!element.disabled && element.name) {
         key = element.name; value = $(element).getValue();
         if (value != null && element.type != 'file' && (element.type != 'submit' || (!submitted &&
             submit !== false && (!submit || key == submit) && (submitted = true)))) {
           if (key in result) {
             if (!Object.isArray(result[key])) result[key] = [result[key]];
             result[key].push(value);
           }
           else result[key] = value;
         }
       }
       return result;
     });
 
     return options.hash ? data : Object.toQueryString(data);
   }
 };
 
 Form.Methods = {
   serialize: function(form, options) {
     return Form.serializeElements(Form.getElements(form), options);
   },
 
   getElements: function(form) {
     var elements = $(form).getElementsByTagName('*'),
         element,
         arr = [ ],
         serializers = Form.Element.Serializers;
     for (var i = 0; element = elements[i]; i++) {
       arr.push(element);
     }
     return arr.inject([], function(elements, child) {
       if (serializers[child.tagName.toLowerCase()])
         elements.push(Element.extend(child));
       return elements;
     })
   },
 
   getInputs: function(form, typeName, name) {
     form = $(form);
     var inputs = form.getElementsByTagName('input');
 
     if (!typeName && !name) return $A(inputs).map(Element.extend);
 
     for (var i = 0, matchingInputs = [], length = inputs.length; i < length; i++) {
       var input = inputs[i];
       if ((typeName && input.type != typeName) || (name && input.name != name))
         continue;
       matchingInputs.push(Element.extend(input));
     }
 
     return matchingInputs;
   },
 
   disable: function(form) {
     form = $(form);
     Form.getElements(form).invoke('disable');
     return form;
   },
 
   enable: function(form) {
     form = $(form);
     Form.getElements(form).invoke('enable');
     return form;
   },
 
   findFirstElement: function(form) {
     var elements = $(form).getElements().findAll(function(element) {
       return 'hidden' != element.type && !element.disabled;
     });
     var firstByIndex = elements.findAll(function(element) {
       return element.hasAttribute('tabIndex') && element.tabIndex >= 0;
     }).sortBy(function(element) { return element.tabIndex }).first();
 
     return firstByIndex ? firstByIndex : elements.find(function(element) {
       return /^(?:input|select|textarea)$/i.test(element.tagName);
     });
   },
 
   focusFirstElement: function(form) {
     form = $(form);
     form.findFirstElement().activate();
     return form;
   },
 
   request: function(form, options) {
     form = $(form), options = Object.clone(options || { });
 
     var params = options.parameters, action = form.readAttribute('action') || '';
     if (action.blank()) action = window.location.href;
     options.parameters = form.serialize(true);
 
     if (params) {
       if (Object.isString(params)) params = params.toQueryParams();
       Object.extend(options.parameters, params);
     }
 
     if (form.hasAttribute('method') && !options.method)
       options.method = form.method;
 
     return new Ajax.Request(action, options);
   }
 };
 
 /*--------------------------------------------------------------------------*/
 
 
 Form.Element = {
   focus: function(element) {
     $(element).focus();
     return element;
   },
 
   select: function(element) {
     $(element).select();
     return element;
   }
 };
 
 Form.Element.Methods = {
 
   serialize: function(element) {
     element = $(element);
     if (!element.disabled && element.name) {
       var value = element.getValue();
       if (value != undefined) {
         var pair = { };
         pair[element.name] = value;
         return Object.toQueryString(pair);
       }
     }
     return '';
   },
 
   getValue: function(element) {
     element = $(element);
     var method = element.tagName.toLowerCase();
     return Form.Element.Serializers[method](element);
   },
 
   setValue: function(element, value) {
     element = $(element);
     var method = element.tagName.toLowerCase();
     Form.Element.Serializers[method](element, value);
     return element;
   },
 
   clear: function(element) {
     $(element).value = '';
     return element;
   },
 
   present: function(element) {
     return $(element).value != '';
   },
 
   activate: function(element) {
     element = $(element);
     try {
       element.focus();
       if (element.select && (element.tagName.toLowerCase() != 'input' ||
           !(/^(?:button|reset|submit)$/i.test(element.type))))
         element.select();
     } catch (e) { }
     return element;
   },
 
   disable: function(element) {
     element = $(element);
     element.disabled = true;
     return element;
   },
 
   enable: function(element) {
     element = $(element);
     element.disabled = false;
     return element;
   }
 };
 
 /*--------------------------------------------------------------------------*/
 
 var Field = Form.Element;
 
 var $F = Form.Element.Methods.getValue;
 
 /*--------------------------------------------------------------------------*/
 
 Form.Element.Serializers = {
   input: function(element, value) {
     switch (element.type.toLowerCase()) {
       case 'checkbox':
       case 'radio':
         return Form.Element.Serializers.inputSelector(element, value);
       default:
         return Form.Element.Serializers.textarea(element, value);
     }
   },
 
   inputSelector: function(element, value) {
     if (Object.isUndefined(value)) return element.checked ? element.value : null;
     else element.checked = !!value;
   },
 
   textarea: function(element, value) {
     if (Object.isUndefined(value)) return element.value;
     else element.value = value;
   },
 
   select: function(element, value) {
     if (Object.isUndefined(value))
       return this[element.type == 'select-one' ?
         'selectOne' : 'selectMany'](element);
     else {
       var opt, currentValue, single = !Object.isArray(value);
       for (var i = 0, length = element.length; i < length; i++) {
         opt = element.options[i];
         currentValue = this.optionValue(opt);
         if (single) {
           if (currentValue == value) {
             opt.selected = true;
             return;
           }
         }
         else opt.selected = value.include(currentValue);
       }
     }
   },
 
   selectOne: function(element) {
     var index = element.selectedIndex;
     return index >= 0 ? this.optionValue(element.options[index]) : null;
   },
 
   selectMany: function(element) {
     var values, length = element.length;
     if (!length) return null;
 
     for (var i = 0, values = []; i < length; i++) {
       var opt = element.options[i];
       if (opt.selected) values.push(this.optionValue(opt));
     }
     return values;
   },
 
   optionValue: function(opt) {
     return Element.extend(opt).hasAttribute('value') ? opt.value : opt.text;
   }
 };
 
 /*--------------------------------------------------------------------------*/
 
 
 Abstract.TimedObserver = Class.create(PeriodicalExecuter, {
   initialize: function($super, element, frequency, callback) {
     $super(callback, frequency);
     this.element   = $(element);
     this.lastValue = this.getValue();
   },
 
   execute: function() {
     var value = this.getValue();
     if (Object.isString(this.lastValue) && Object.isString(value) ?
         this.lastValue != value : String(this.lastValue) != String(value)) {
       this.callback(this.element, value);
       this.lastValue = value;
     }
   }
 });
 
 Form.Element.Observer = Class.create(Abstract.TimedObserver, {
   getValue: function() {
     return Form.Element.getValue(this.element);
   }
 });
 
 Form.Observer = Class.create(Abstract.TimedObserver, {
   getValue: function() {
     return Form.serialize(this.element);
   }
 });
 
 /*--------------------------------------------------------------------------*/
 
 Abstract.EventObserver = Class.create({
   initialize: function(element, callback) {
     this.element  = $(element);
     this.callback = callback;
 
     this.lastValue = this.getValue();
     if (this.element.tagName.toLowerCase() == 'form')
       this.registerFormCallbacks();
     else
       this.registerCallback(this.element);
   },
 
   onElementEvent: function() {
     var value = this.getValue();
     if (this.lastValue != value) {
       this.callback(this.element, value);
       this.lastValue = value;
     }
   },
 
   registerFormCallbacks: function() {
     Form.getElements(this.element).each(this.registerCallback, this);
   },
 
   registerCallback: function(element) {
     if (element.type) {
       switch (element.type.toLowerCase()) {
         case 'checkbox':
         case 'radio':
           Event.observe(element, 'click', this.onElementEvent.bind(this));
           break;
         default:
           Event.observe(element, 'change', this.onElementEvent.bind(this));
           break;
       }
     }
   }
 });
 
 Form.Element.EventObserver = Class.create(Abstract.EventObserver, {
   getValue: function() {
     return Form.Element.getValue(this.element);
   }
 });
 
 Form.EventObserver = Class.create(Abstract.EventObserver, {
   getValue: function() {
     return Form.serialize(this.element);
   }
 });
 (function() {
 
   var Event = {
     KEY_BACKSPACE: 8,
     KEY_TAB:       9,
     KEY_RETURN:   13,
     KEY_ESC:      27,
     KEY_LEFT:     37,
     KEY_UP:       38,
     KEY_RIGHT:    39,
     KEY_DOWN:     40,
     KEY_DELETE:   46,
     KEY_HOME:     36,
     KEY_END:      35,
     KEY_PAGEUP:   33,
     KEY_PAGEDOWN: 34,
     KEY_INSERT:   45,
 
     cache: {}
   };
 
   var docEl = document.documentElement;
   var MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED = 'onmouseenter' in docEl
     && 'onmouseleave' in docEl;
 
   var _isButton;
   if (Prototype.Browser.IE) {
     var buttonMap = { 0: 1, 1: 4, 2: 2 };
     _isButton = function(event, code) {
       return event.button === buttonMap[code];
     };
   } else if (Prototype.Browser.WebKit) {
     _isButton = function(event, code) {
       switch (code) {
         case 0: return event.which == 1 && !event.metaKey;
         case 1: return event.which == 1 && event.metaKey;
         default: return false;
       }
     };
   } else {
     _isButton = function(event, code) {
       return event.which ? (event.which === code + 1) : (event.button === code);
     };
   }
 
   function isLeftClick(event)   { return _isButton(event, 0) }
 
   function isMiddleClick(event) { return _isButton(event, 1) }
 
   function isRightClick(event)  { return _isButton(event, 2) }
 
   function element(event) {
     event = Event.extend(event);
 
     var node = event.target, type = event.type,
      currentTarget = event.currentTarget;
 
     if (currentTarget && currentTarget.tagName) {
       if (type === 'load' || type === 'error' ||
         (type === 'click' && currentTarget.tagName.toLowerCase() === 'input'
           && currentTarget.type === 'radio'))
             node = currentTarget;
     }
 
     if (node.nodeType == Node.TEXT_NODE)
       node = node.parentNode;
 
     return Element.extend(node);
   }
 
   function findElement(event, expression) {
     var element = Event.element(event);
     if (!expression) return element;
     var elements = [element].concat(element.ancestors());
     return Selector.findElement(elements, expression, 0);
   }
 
   function pointer(event) {
     return { x: pointerX(event), y: pointerY(event) };
   }
 
   function pointerX(event) {
     var docElement = document.documentElement,
      body = document.body || { scrollLeft: 0 };
 
     return event.pageX || (event.clientX +
       (docElement.scrollLeft || body.scrollLeft) -
       (docElement.clientLeft || 0));
   }
 
   function pointerY(event) {
     var docElement = document.documentElement,
      body = document.body || { scrollTop: 0 };
 
     return  event.pageY || (event.clientY +
        (docElement.scrollTop || body.scrollTop) -
        (docElement.clientTop || 0));
   }
 
 
   function stop(event) {
     Event.extend(event);
     event.preventDefault();
     event.stopPropagation();
 
     event.stopped = true;
   }
 
   Event.Methods = {
     isLeftClick: isLeftClick,
     isMiddleClick: isMiddleClick,
     isRightClick: isRightClick,
 
     element: element,
     findElement: findElement,
 
     pointer: pointer,
     pointerX: pointerX,
     pointerY: pointerY,
 
     stop: stop
   };
 
 
   var methods = Object.keys(Event.Methods).inject({ }, function(m, name) {
     m[name] = Event.Methods[name].methodize();
     return m;
   });
 
   if (Prototype.Browser.IE) {
     function _relatedTarget(event) {
       var element;
       switch (event.type) {
         case 'mouseover': element = event.fromElement; break;
         case 'mouseout':  element = event.toElement;   break;
         default: return null;
       }
       return Element.extend(element);
     }
 
     Object.extend(methods, {
       stopPropagation: function() { this.cancelBubble = true },
       preventDefault:  function() { this.returnValue = false },
       inspect: function() { return '[object Event]' }
     });
 
     Event.extend = function(event, element) {
       if (!event) return false;
       if (event._extendedByPrototype) return event;
 
       event._extendedByPrototype = Prototype.emptyFunction;
       var pointer = Event.pointer(event);
 
       Object.extend(event, {
         target: event.srcElement || element,
         relatedTarget: _relatedTarget(event),
         pageX:  pointer.x,
         pageY:  pointer.y
       });
 
       return Object.extend(event, methods);
     };
   } else {
     Event.prototype = window.Event.prototype || document.createEvent('HTMLEvents').__proto__;
     Object.extend(Event.prototype, methods);
     Event.extend = Prototype.K;
   }
 
   function _createResponder(element, eventName, handler) {
     var registry = Element.retrieve(element, 'prototype_event_registry');
 
     if (Object.isUndefined(registry)) {
       CACHE.push(element);
       registry = Element.retrieve(element, 'prototype_event_registry', $H());
     }
 
     var respondersForEvent = registry.get(eventName);
     if (Object.isUndefined(respondersForEvent)) {
       respondersForEvent = [];
       registry.set(eventName, respondersForEvent);
     }
 
     if (respondersForEvent.pluck('handler').include(handler)) return false;
 
     var responder;
     if (eventName.include(":")) {
       responder = function(event) {
         if (Object.isUndefined(event.eventName))
           return false;
 
         if (event.eventName !== eventName)
           return false;
 
         Event.extend(event, element);
         handler.call(element, event);
       };
     } else {
       if (!MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED &&
        (eventName === "mouseenter" || eventName === "mouseleave")) {
         if (eventName === "mouseenter" || eventName === "mouseleave") {
           responder = function(event) {
             Event.extend(event, element);
 
             var parent = event.relatedTarget;
             while (parent && parent !== element) {
               try { parent = parent.parentNode; }
               catch(e) { parent = element; }
             }
 
             if (parent === element) return;
 
             handler.call(element, event);
           };
         }
       } else {
         responder = function(event) {
           Event.extend(event, element);
           handler.call(element, event);
         };
       }
     }
 
     responder.handler = handler;
     respondersForEvent.push(responder);
     return responder;
   }
 
   function _destroyCache() {
     for (var i = 0, length = CACHE.length; i < length; i++) {
       Event.stopObserving(CACHE[i]);
       CACHE[i] = null;
     }
   }
 
   var CACHE = [];
 
   if (Prototype.Browser.IE)
     window.attachEvent('onunload', _destroyCache);
 
   if (Prototype.Browser.WebKit)
     window.addEventListener('unload', Prototype.emptyFunction, false);
 
 
   var _getDOMEventName = Prototype.K;
 
   if (!MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED) {
     _getDOMEventName = function(eventName) {
       var translations = { mouseenter: "mouseover", mouseleave: "mouseout" };
       return eventName in translations ? translations[eventName] : eventName;
     };
   }
 
   function observe(element, eventName, handler) {
     element = $(element);
 
     var responder = _createResponder(element, eventName, handler);
 
     if (!responder) return element;
 
     if (eventName.include(':')) {
       if (element.addEventListener)
         element.addEventListener("dataavailable", responder, false);
       else {
         element.attachEvent("ondataavailable", responder);
         element.attachEvent("onfilterchange", responder);
       }
     } else {
       var actualEventName = _getDOMEventName(eventName);
 
       if (element.addEventListener)
         element.addEventListener(actualEventName, responder, false);
       else
         element.attachEvent("on" + actualEventName, responder);
     }
 
     return element;
   }
 
   function stopObserving(element, eventName, handler) {
     element = $(element);
 
     var registry = Element.retrieve(element, 'prototype_event_registry');
 
     if (Object.isUndefined(registry)) return element;
 
     if (eventName && !handler) {
       var responders = registry.get(eventName);
 
       if (Object.isUndefined(responders)) return element;
 
       responders.each( function(r) {
         Element.stopObserving(element, eventName, r.handler);
       });
       return element;
     } else if (!eventName) {
       registry.each( function(pair) {
         var eventName = pair.key, responders = pair.value;
 
         responders.each( function(r) {
           Element.stopObserving(element, eventName, r.handler);
         });
       });
       return element;
     }
 
     var responders = registry.get(eventName);
 
     if (!responders) return;
 
     var responder = responders.find( function(r) { return r.handler === handler; });
     if (!responder) return element;
 
     var actualEventName = _getDOMEventName(eventName);
 
     if (eventName.include(':')) {
       if (element.removeEventListener)
         element.removeEventListener("dataavailable", responder, false);
       else {
         element.detachEvent("ondataavailable", responder);
         element.detachEvent("onfilterchange",  responder);
       }
     } else {
       if (element.removeEventListener)
         element.removeEventListener(actualEventName, responder, false);
       else
         element.detachEvent('on' + actualEventName, responder);
     }
 
     registry.set(eventName, responders.without(responder));
 
     return element;
   }
 
   function fire(element, eventName, memo, bubble) {
     element = $(element);
 
     if (Object.isUndefined(bubble))
       bubble = true;
 
     if (element == document && document.createEvent && !element.dispatchEvent)
       element = document.documentElement;
 
     var event;
     if (document.createEvent) {
       event = document.createEvent('HTMLEvents');
       event.initEvent('dataavailable', true, true);
     } else {
       event = document.createEventObject();
       event.eventType = bubble ? 'ondataavailable' : 'onfilterchange';
     }
 
     event.eventName = eventName;
     event.memo = memo || { };
 
     if (document.createEvent)
       element.dispatchEvent(event);
     else
       element.fireEvent(event.eventType, event);
 
     return Event.extend(event);
   }
 
 
   Object.extend(Event, Event.Methods);
 
   Object.extend(Event, {
     fire:          fire,
     observe:       observe,
     stopObserving: stopObserving
   });
 
   Element.addMethods({
     fire:          fire,
 
     observe:       observe,
 
     stopObserving: stopObserving
   });
 
   Object.extend(document, {
     fire:          fire.methodize(),
 
     observe:       observe.methodize(),
 
     stopObserving: stopObserving.methodize(),
 
     loaded:        false
   });
 
   if (window.Event) Object.extend(window.Event, Event);
   else window.Event = Event;
 })();
 
 (function() {
   /* Support for the DOMContentLoaded event is based on work by Dan Webb,
      Matthias Miller, Dean Edwards, John Resig, and Diego Perini. */
 
   var timer;
 
   function fireContentLoadedEvent() {
     if (document.loaded) return;
     if (timer) window.clearTimeout(timer);
     document.loaded = true;
     document.fire('dom:loaded');
   }
 
   function checkReadyState() {
     if (document.readyState === 'complete') {
       document.stopObserving('readystatechange', checkReadyState);
       fireContentLoadedEvent();
     }
   }
 
   function pollDoScroll() {
     try { document.documentElement.doScroll('left'); }
     catch(e) {
       timer = pollDoScroll.defer();
       return;
     }
     fireContentLoadedEvent();
   }
 
   if (document.addEventListener) {
     document.addEventListener('DOMContentLoaded', fireContentLoadedEvent, false);
   } else {
     document.observe('readystatechange', checkReadyState);
     if (window == top)
       timer = pollDoScroll.defer();
   }
 
   Event.observe(window, 'load', fireContentLoadedEvent);
 })();
 
 Element.addMethods();
 
 /*------------------------------- DEPRECATED -------------------------------*/
 
 Hash.toQueryString = Object.toQueryString;
 
 var Toggle = { display: Element.toggle };
 
 Element.Methods.childOf = Element.Methods.descendantOf;
 
 var Insertion = {
   Before: function(element, content) {
     return Element.insert(element, {before:content});
   },
 
   Top: function(element, content) {
     return Element.insert(element, {top:content});
   },
 
   Bottom: function(element, content) {
     return Element.insert(element, {bottom:content});
   },
 
   After: function(element, content) {
     return Element.insert(element, {after:content});
   }
 };
 
 var $continue = new Error('"throw $continue" is deprecated, use "return" instead');
 
 var Position = {
   includeScrollOffsets: false,
 
   prepare: function() {
     this.deltaX =  window.pageXOffset
                 || document.documentElement.scrollLeft
                 || document.body.scrollLeft
                 || 0;
     this.deltaY =  window.pageYOffset
                 || document.documentElement.scrollTop
                 || document.body.scrollTop
                 || 0;
   },
 
   within: function(element, x, y) {
     if (this.includeScrollOffsets)
       return this.withinIncludingScrolloffsets(element, x, y);
     this.xcomp = x;
     this.ycomp = y;
     this.offset = Element.cumulativeOffset(element);
 
     return (y >= this.offset[1] &&
             y <  this.offset[1] + element.offsetHeight &&
             x >= this.offset[0] &&
             x <  this.offset[0] + element.offsetWidth);
   },
 
   withinIncludingScrolloffsets: function(element, x, y) {
     var offsetcache = Element.cumulativeScrollOffset(element);
 
     this.xcomp = x + offsetcache[0] - this.deltaX;
     this.ycomp = y + offsetcache[1] - this.deltaY;
     this.offset = Element.cumulativeOffset(element);
 
     return (this.ycomp >= this.offset[1] &&
             this.ycomp <  this.offset[1] + element.offsetHeight &&
             this.xcomp >= this.offset[0] &&
             this.xcomp <  this.offset[0] + element.offsetWidth);
   },
 
   overlap: function(mode, element) {
     if (!mode) return 0;
     if (mode == 'vertical')
       return ((this.offset[1] + element.offsetHeight) - this.ycomp) /
         element.offsetHeight;
     if (mode == 'horizontal')
       return ((this.offset[0] + element.offsetWidth) - this.xcomp) /
         element.offsetWidth;
   },
 
 
   cumulativeOffset: Element.Methods.cumulativeOffset,
 
   positionedOffset: Element.Methods.positionedOffset,
 
   absolutize: function(element) {
     Position.prepare();
     return Element.absolutize(element);
   },
 
   relativize: function(element) {
     Position.prepare();
     return Element.relativize(element);
   },
 
   realOffset: Element.Methods.cumulativeScrollOffset,
 
   offsetParent: Element.Methods.getOffsetParent,
 
   page: Element.Methods.viewportOffset,
 
   clone: function(source, target, options) {
     options = options || { };
     return Element.clonePosition(target, source, options);
   }
 };
 
 /*--------------------------------------------------------------------------*/
 
 if (!document.getElementsByClassName) document.getElementsByClassName = function(instanceMethods){
   function iter(name) {
     return name.blank() ? null : "[contains(concat(' ', @class, ' '), ' " + name + " ')]";
   }
 
   instanceMethods.getElementsByClassName = Prototype.BrowserFeatures.XPath ?
   function(element, className) {
     className = className.toString().strip();
     var cond = /\s/.test(className) ? $w(className).map(iter).join('') : iter(className);
     return cond ? document._getElementsByXPath('.//*' + cond, element) : [];
   } : function(element, className) {
     className = className.toString().strip();
     var elements = [], classNames = (/\s/.test(className) ? $w(className) : null);
     if (!classNames && !className) return elements;
 
     var nodes = $(element).getElementsByTagName('*');
     className = ' ' + className + ' ';
 
     for (var i = 0, child, cn; child = nodes[i]; i++) {
       if (child.className && (cn = ' ' + child.className + ' ') && (cn.include(className) ||
           (classNames && classNames.all(function(name) {
             return !name.toString().blank() && cn.include(' ' + name + ' ');
           }))))
         elements.push(Element.extend(child));
     }
     return elements;
   };
 
   return function(className, parentElement) {
     return $(parentElement || document.body).getElementsByClassName(className);
   };
 }(Element.Methods);
 
 /*--------------------------------------------------------------------------*/
 
 Element.ClassNames = Class.create();
 Element.ClassNames.prototype = {
   initialize: function(element) {
     this.element = $(element);
   },
 
   _each: function(iterator) {
     this.element.className.split(/\s+/).select(function(name) {
       return name.length > 0;
     })._each(iterator);
   },
 
   set: function(className) {
     this.element.className = className;
   },
 
   add: function(classNameToAdd) {
     if (this.include(classNameToAdd)) return;
     this.set($A(this).concat(classNameToAdd).join(' '));
   },
 
   remove: function(classNameToRemove) {
     if (!this.include(classNameToRemove)) return;
     this.set($A(this).without(classNameToRemove).join(' '));
   },
 
   toString: function() {
     return $A(this).join(' ');
   }
 };
 
 Object.extend(Element.ClassNames.prototype, Enumerable);
 
 /*--------------------------------------------------------------------------*/