本文共 39178 字，大约阅读时间需要 130 分钟。

附录prototype.js的代码：

Prototype = { Version: '1.5.1_rc4', Browser: { IE: !!(window.attachEvent && !window.opera), Opera: !!window.opera, WebKit: navigator.userAgent.indexOf('AppleWebKit/') > -1, Gecko: navigator.userAgent.indexOf('Gecko') > -1 && navigator.userAgent.indexOf('KHTML') == -1 }, BrowserFeatures: { XPath: !!document.evaluate, ElementExtensions: !!window.HTMLElement, SpecificElementExtensions: (document.createElement('div').__proto__ !== document.createElement('form').__proto__) }, ScriptFragment: '<mce:script[^><!-- ]*>([/u0001-/uFFFF]*?) // --></mce:script>', JSONFilter: /^///*-secure-/s*(.*)/s*/*///s*$/, emptyFunction: function() { }, K: function(x) { return x } } var Class = { create: function() { return function() { this.initialize.apply(this, arguments); } } } var Abstract = new Object(); Object.extend = function(destination, source) { for (var property in source) { destination[property] = source[property]; } return destination; } Object.extend(Object, { inspect: function(object) { try { if (object === undefined) return 'undefined'; if (object === null) return 'null'; return object.inspect ? object.inspect() : object.toString(); } catch (e) { if (e instanceof RangeError) return '...'; throw e; } }, toJSON: function(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 (object.ownerDocument === document) return; var results = []; for (var property in object) { var value = Object.toJSON(object[property]); if (value !== undefined) results.push(property.toJSON() + ': ' + value); } return '{' + results.join(', ') + '}'; }, keys: function(object) { var keys = []; for (var property in object) keys.push(property); return keys; }, values: function(object) { var values = []; for (var property in object) values.push(object[property]); return values; }, clone: function(object) { return Object.extend({}, object); } }); Function.prototype.bind = function() { var __method = this, args = $A(arguments), object = args.shift(); return function() { return __method.apply(object, args.concat($A(arguments))); } } Function.prototype.bindAsEventListener = function(object) { var __method = this, args = $A(arguments), object = args.shift(); return function(event) { return __method.apply(object, [( event || window.event)].concat(args).concat($A(arguments))); } } Object.extend(Number.prototype, { toColorPart: function() { return this.toPaddedString(2, 16); }, succ: function() { return this + 1; }, times: function(iterator) { $R(0, this, true).each(iterator); return this; }, toPaddedString: function(length, radix) { var string = this.toString(radix || 10); return '0'.times(length - string.length) + string; }, toJSON: function() { return isFinite(this) ? this.toString() : 'null'; } }); Date.prototype.toJSON = function() { return '"' + this.getFullYear() + '-' + (this.getMonth() + 1).toPaddedString(2) + '-' + this.getDate().toPaddedString(2) + 'T' + this.getHours().toPaddedString(2) + ':' + this.getMinutes().toPaddedString(2) + ':' + this.getSeconds().toPaddedString(2) + '"'; }; 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; } } /*--------------------------------------------------------------------------*/ var PeriodicalExecuter = Class.create(); PeriodicalExecuter.prototype = { 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); }, stop: function() { if (!this.timer) return; clearInterval(this.timer); this.timer = null; }, onTimerEvent: function() { if (!this.currentlyExecuting) { try { this.currentlyExecuting = true; this.callback(this); } finally { this.currentlyExecuting = false; } } } } 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, { gsub: function(pattern, replacement) { var result = '', source = this, match; replacement = arguments.callee.prepareReplacement(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; }, sub: function(pattern, replacement, count) { replacement = this.gsub.prepareReplacement(replacement); count = count === undefined ? 1 : count; return this.gsub(pattern, function(match) { if (--count < 0) return match[0]; return replacement(match); }); }, scan: function(pattern, iterator) { this.gsub(pattern, iterator); return this; }, truncate: function(length, truncation) { length = length || 30; truncation = truncation === undefined ? '...' : truncation; return this.length > length ? this.slice(0, length - truncation.length) + truncation : this; }, strip: function() { return this.replace(/^/s+/, '').replace(//s+$/, ''); }, stripTags: function() { return this.replace(/<//?[^>]+>/gi, ''); }, stripScripts: function() { return this.replace(new RegExp(Prototype.ScriptFragment, 'img'), ''); }, extractScripts: function() { 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]; }); }, evalScripts: function() { return this.extractScripts().map(function(script) { return eval(script) }); }, escapeHTML: function() { var self = arguments.callee; self.text.data = this; return self.div.innerHTML; }, unescapeHTML: function() { var div = document.createElement('div'); div.innerHTML = this.stripTags(); return div.childNodes[0] ? (div.childNodes.length > 1 ? $A(div.childNodes).inject('', function(memo, node) { return memo+node.nodeValue }) : div.childNodes[0].nodeValue) : ''; }, toQueryParams: function(separator) { var match = this.strip().match(/([^?#]*)(#.*)?$/); 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 (hash[key].constructor != Array) hash[key] = [hash[key]]; hash[key].push(value); } else hash[key] = value; } return hash; }); }, toArray: function() { return this.split(''); }, succ: function() { return this.slice(0, this.length - 1) + String.fromCharCode(this.charCodeAt(this.length - 1) + 1); }, times: function(count) { var result = ''; for (var i = 0; i < count; i++) result += this; return result; }, camelize: function() { 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; }, capitalize: function() { return this.charAt(0).toUpperCase() + this.substring(1).toLowerCase(); }, underscore: function() { return this.gsub(/::/, '/').gsub(/([A-Z]+)([A-Z][a-z])/,'#{1}_#{2}').gsub(/([a-z/d])([A-Z])/,'#{1}_#{2}').gsub(/-/,'_').toLowerCase(); }, dasherize: function() { return this.gsub(/_/,'-'); }, inspect: function(useDoubleQuotes) { var escapedString = this.gsub(/[/x00-/x1f//]/, function(match) { var character = String.specialChar[match[0]]; return character ? character : '//u00' + match[0].charCodeAt().toPaddedString(2, 16); }); if (useDoubleQuotes) return '"' + escapedString.replace(/"/g, '//"') + '"'; return "'" + escapedString.replace(/'/g, '///'') + "'"; }, toJSON: function() { return this.inspect(true); }, unfilterJSON: function(filter) { return this.sub(filter || Prototype.JSONFilter, '#{1}'); }, evalJSON: function(sanitize) { var json = this.unfilterJSON(); try { if (!sanitize || (/^("(//.|[^"///n/r])*?"|[,:{}/[/]0-9./-+Eaeflnr-u /n/r/t])+?$/.test(json))) return eval('(' + json + ')'); } catch (e) { } throw new SyntaxError('Badly formed JSON string: ' + this.inspect()); }, include: function(pattern) { return this.indexOf(pattern) > -1; }, startsWith: function(pattern) { return this.indexOf(pattern) === 0; }, endsWith: function(pattern) { var d = this.length - pattern.length; return d >= 0 && this.lastIndexOf(pattern) === d; }, empty: function() { return this == ''; }, blank: function() { return /^/s*$/.test(this); } }); if (Prototype.Browser.WebKit || Prototype.Browser.IE) Object.extend(String.prototype, { escapeHTML: function() { return this.replace(/&/g,'&').replace(/</g,'<').replace(/>/g,'>'); }, unescapeHTML: function() { return this.replace(/&/g,'&').replace(/</g,'<').replace(/>/g,'>'); } }); String.prototype.gsub.prepareReplacement = function(replacement) { if (typeof replacement == 'function') return replacement; var template = new Template(replacement); return function(match) { return template.evaluate(match) }; } String.prototype.parseQuery = String.prototype.toQueryParams; Object.extend(String.prototype.escapeHTML, { div: document.createElement('div'), text: document.createTextNode('') }); with (String.prototype.escapeHTML) div.appendChild(text); var Template = Class.create(); Template.Pattern = /(^|.|/r|/n)(#/{(.*?)/})/; Template.prototype = { initialize: function(template, pattern) { this.template = template.toString(); this.pattern = pattern || Template.Pattern; }, evaluate: function(object) { return this.template.gsub(this.pattern, function(match) { var before = match[1]; if (before == '//') return match[2]; return before + String.interpret(object[match[3]]); }); } } var $break = {}, $continue = new Error('"throw $continue" is deprecated, use "return" instead'); var Enumerable = { each: function(iterator) { var index = 0; try { this._each(function(value) { iterator(value, index++); }); } catch (e) { if (e != $break) throw e; } return this; }, eachSlice: function(number, iterator) { var index = -number, slices = [], array = this.toArray(); while ((index += number) < array.length) slices.push(array.slice(index, index+number)); return slices.map(iterator); }, all: function(iterator) { var result = true; this.each(function(value, index) { result = result && !!(iterator || Prototype.K)(value, index); if (!result) throw $break; }); return result; }, any: function(iterator) { var result = false; this.each(function(value, index) { if (result = !!(iterator || Prototype.K)(value, index)) throw $break; }); return result; }, collect: function(iterator) { var results = []; this.each(function(value, index) { results.push((iterator || Prototype.K)(value, index)); }); return results; }, detect: function(iterator) { var result; this.each(function(value, index) { if (iterator(value, index)) { result = value; throw $break; } }); return result; }, findAll: function(iterator) { var results = []; this.each(function(value, index) { if (iterator(value, index)) results.push(value); }); return results; }, grep: function(pattern, iterator) { var results = []; this.each(function(value, index) { var stringValue = value.toString(); if (stringValue.match(pattern)) results.push((iterator || Prototype.K)(value, index)); }) return results; }, include: function(object) { var found = false; this.each(function(value) { if (value == object) { found = true; throw $break; } }); return found; }, inGroupsOf: function(number, fillWith) { fillWith = fillWith === undefined ? null : fillWith; return this.eachSlice(number, function(slice) { while(slice.length < number) slice.push(fillWith); return slice; }); }, inject: function(memo, iterator) { this.each(function(value, index) { memo = iterator(memo, value, index); }); return memo; }, invoke: function(method) { var args = $A(arguments).slice(1); return this.map(function(value) { return value[method].apply(value, args); }); }, max: function(iterator) { var result; this.each(function(value, index) { value = (iterator || Prototype.K)(value, index); if (result == undefined || value >= result) result = value; }); return result; }, min: function(iterator) { var result; this.each(function(value, index) { value = (iterator || Prototype.K)(value, index); if (result == undefined || value < result) result = value; }); return result; }, partition: function(iterator) { var trues = [], falses = []; this.each(function(value, index) { ((iterator || Prototype.K)(value, index) ? trues : falses).push(value); }); return [trues, falses]; }, pluck: function(property) { var results = []; this.each(function(value, index) { results.push(value[property]); }); return results; }, reject: function(iterator) { var results = []; this.each(function(value, index) { if (!iterator(value, index)) results.push(value); }); return results; }, sortBy: function(iterator) { return this.map(function(value, index) { return {value: value, criteria: iterator(value, index)}; }).sort(function(left, right) { var a = left.criteria, b = right.criteria; return a < b ? -1 : a > b ? 1 : 0; }).pluck('value'); }, toArray: function() { return this.map(); }, zip: function() { var iterator = Prototype.K, args = $A(arguments); if (typeof args.last() == 'function') iterator = args.pop(); var collections = [this].concat(args).map($A); return this.map(function(value, index) { return iterator(collections.pluck(index)); }); }, size: function() { return this.toArray().length; }, inspect: function() { return '#<Enumerable:' + this.toArray().inspect() + '>'; } } Object.extend(Enumerable, { map: Enumerable.collect, find: Enumerable.detect, select: Enumerable.findAll, member: Enumerable.include, entries: Enumerable.toArray }); var $A = Array.from = function(iterable) { if (!iterable) return []; if (iterable.toArray) { return iterable.toArray(); } else { var results = []; for (var i = 0, length = iterable.length; i < length; i++) results.push(iterable[i]); return results; } } if (Prototype.Browser.WebKit) { $A = Array.from = function(iterable) { if (!iterable) return []; if (!(typeof iterable == 'function' && iterable == '[object NodeList]') && iterable.toArray) { return iterable.toArray(); } else { var results = []; for (var i = 0, length = iterable.length; i < length; i++) results.push(iterable[i]); return results; } } } Object.extend(Array.prototype, Enumerable); if (!Array.prototype._reverse) Array.prototype._reverse = Array.prototype.reverse; Object.extend(Array.prototype, { _each: function(iterator) { for (var i = 0, length = this.length; i < length; i++) iterator(this[i]); }, clear: function() { this.length = 0; return this; }, first: function() { return this[0]; }, last: function() { return this[this.length - 1]; }, compact: function() { return this.select(function(value) { return value != null; }); }, flatten: function() { return this.inject([], function(array, value) { return array.concat(value && value.constructor == Array ? value.flatten() : [value]); }); }, without: function() { var values = $A(arguments); return this.select(function(value) { return !values.include(value); }); }, indexOf: function(object) { for (var i = 0, length = this.length; i < length; i++) if (this[i] == object) return i; return -1; }, reverse: function(inline) { return (inline !== false ? this : this.toArray())._reverse(); }, reduce: function() { return this.length > 1 ? this : this[0]; }, uniq: function(sorted) { return this.inject([], function(array, value, index) { if (0 == index || (sorted ? array.last() != value : !array.include(value))) array.push(value); return array; }); }, clone: function() { return [].concat(this); }, size: function() { return this.length; }, inspect: function() { return '[' + this.map(Object.inspect).join(', ') + ']'; }, toJSON: function() { var results = []; this.each(function(object) { var value = Object.toJSON(object); if (value !== undefined) results.push(value); }); return '[' + results.join(', ') + ']'; } }); Array.prototype.toArray = Array.prototype.clone; function $w(string) { string = string.strip(); return string ? string.split(//s+/) : []; } if (Prototype.Browser.Opera){ Array.prototype.concat = function() { var array = []; for (var i = 0, length = this.length; i < length; i++) array.push(this[i]); for (var i = 0, length = arguments.length; i < length; i++) { if (arguments[i].constructor == Array) { for (var j = 0, arrayLength = arguments[i].length; j < arrayLength; j++) array.push(arguments[i][j]); } else { array.push(arguments[i]); } } return array; } } var Hash = function(object) { if (object instanceof Hash) this.merge(object); else Object.extend(this, object || {}); }; Object.extend(Hash, { toQueryString: function(obj) { var parts = []; parts.add = arguments.callee.addPair; this.prototype._each.call(obj, function(pair) { if (!pair.key) return; var value = pair.value; if (value && typeof value == 'object') { if (value.constructor == Array) value.each(function(value) { parts.add(pair.key, value); }); return; } parts.add(pair.key, value); }); return parts.join('&'); }, toJSON: function(object) { var results = []; this.prototype._each.call(object, function(pair) { var value = Object.toJSON(pair.value); if (value !== undefined) results.push(pair.key.toJSON() + ': ' + value); }); return '{' + results.join(', ') + '}'; } }); Hash.toQueryString.addPair = function(key, value, prefix) { key = encodeURIComponent(key); if (value === undefined) this.push(key); else this.push(key + '=' + (value == null ? '' : encodeURIComponent(value))); } Object.extend(Hash.prototype, Enumerable); Object.extend(Hash.prototype, { _each: function(iterator) { for (var key in this) { var value = this[key]; if (value && value == Hash.prototype[key]) continue; var pair = [key, value]; pair.key = key; pair.value = value; iterator(pair); } }, keys: function() { return this.pluck('key'); }, values: function() { return this.pluck('value'); }, merge: function(hash) { return $H(hash).inject(this, function(mergedHash, pair) { mergedHash[pair.key] = pair.value; return mergedHash; }); }, remove: function() { var result; for(var i = 0, length = arguments.length; i < length; i++) { var value = this[arguments[i]]; if (value !== undefined){ if (result === undefined) result = value; else { if (result.constructor != Array) result = [result]; result.push(value) } } delete this[arguments[i]]; } return result; }, toQueryString: function() { return Hash.toQueryString(this); }, inspect: function() { return '#<Hash:{' + this.map(function(pair) { return pair.map(Object.inspect).join(': '); }).join(', ') + '}>'; }, toJSON: function() { return Hash.toJSON(this); } }); function $H(object) { if (object instanceof Hash) return object; return new Hash(object); }; // Safari iterates over shadowed properties if (function() { var i = 0, Test = function(value) { this.key = value }; Test.prototype.key = 'foo'; for (var property in new Test('bar')) i++; return i > 1; }()) Hash.prototype._each = function(iterator) { var cache = []; for (var key in this) { var value = this[key]; if ((value && value == Hash.prototype[key]) || cache.include(key)) continue; cache.push(key); var pair = [key, value]; pair.key = key; pair.value = value; iterator(pair); } }; ObjectRange = Class.create(); Object.extend(ObjectRange.prototype, Enumerable); Object.extend(ObjectRange.prototype, { initialize: function(start, end, exclusive) { this.start = start; this.end = end; this.exclusive = exclusive; }, _each: function(iterator) { var value = this.start; while (this.include(value)) { iterator(value); value = value.succ(); } }, include: function(value) { if (value < this.start) return false; if (this.exclusive) return value < this.end; return value <= this.end; } }); var $R = function(start, end, exclusive) { return new ObjectRange(start, end, exclusive); } 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 (typeof responder[callback] == 'function') { 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 = function() {}; Ajax.Base.prototype = { setOptions: function(options) { this.options = { method: 'post', asynchronous: true, contentType: 'application/x-www-form-urlencoded', encoding: 'UTF-8', parameters: '' } Object.extend(this.options, options || {}); this.options.method = this.options.method.toLowerCase(); if (typeof this.options.parameters == 'string') this.options.parameters = this.options.parameters.toQueryParams(); } } Ajax.Request = Class.create(); Ajax.Request.Events = ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete']; Ajax.Request.prototype = Object.extend(new Ajax.Base(), { _complete: false, initialize: function(url, options) { this.transport = Ajax.getTransport(); this.setOptions(options); 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)) { // simulate other verbs over post params['_method'] = this.method; this.method = 'post'; } this.parameters = params; if (params = Hash.toQueryString(params)) { // when GET, append parameters to URL if (this.method == 'get') this.url += (this.url.include('?') ? '&' : '?') + params; else if (/Konqueror|Safari|KHTML/.test(navigator.userAgent)) params += '&_='; } try { if (this.options.onCreate) this.options.onCreate(this.transport); Ajax.Responders.dispatch('onCreate', this, this.transport); this.transport.open(this.method.toUpperCase(), this.url, this.options.asynchronous); if (this.options.asynchronous) setTimeout(function() { this.respondToReadyState(1) }.bind(this), 10); 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'; } // user-defined headers if (typeof this.options.requestHeaders == 'object') { var extras = this.options.requestHeaders; if (typeof extras.push == 'function') for (var i = 0, length = extras.length; i < length; i += 2) headers[extras[i]] = extras[i+1]; else $H(extras).each(function(pair) { headers[pair.key] = pair.value }); } for (var name in headers) this.transport.setRequestHeader(name, headers[name]); }, success: function() { return !this.transport.status || (this.transport.status >= 200 && this.transport.status < 300); }, respondToReadyState: function(readyState) { var state = Ajax.Request.Events[readyState]; var transport = this.transport, json = this.evalJSON(); if (state == 'Complete') { try { this._complete = true; (this.options['on' + this.transport.status] || this.options['on' + (this.success() ? 'Success' : 'Failure')] || Prototype.emptyFunction)(transport, json); } catch (e) { this.dispatchException(e); } var contentType = this.getHeader('Content-type'); if (contentType && contentType.strip(). match(/^(text|application)//(x-)?(java|ecma)script(;.*)?$/i)) this.evalResponse(); } try { (this.options['on' + state] || Prototype.emptyFunction)(transport, json); Ajax.Responders.dispatch('on' + state, this, transport, json); } catch (e) { this.dispatchException(e); } if (state == 'Complete') { // avoid memory leak in MSIE: clean up this.transport.onreadystatechange = Prototype.emptyFunction; } }, getHeader: function(name) { try { return this.transport.getResponseHeader(name); } catch (e) { return null } }, evalJSON: function() { try { var json = this.getHeader('X-JSON'); return json ? json.evalJSON() : 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.Updater = Class.create(); Object.extend(Object.extend(Ajax.Updater.prototype, Ajax.Request.prototype), { initialize: function(container, url, options) { this.container = { success: (container.success || container), failure: (container.failure || (container.success ? null : container)) } this.transport = Ajax.getTransport(); this.setOptions(options); var onComplete = this.options.onComplete || Prototype.emptyFunction; this.options.onComplete = (function(transport, param) { this.updateContent(); onComplete(transport, param); }).bind(this); this.request(url); }, updateContent: function() { var receiver = this.container[this.success() ? 'success' : 'failure']; var response = this.transport.responseText; if (!this.options.evalScripts) response = response.stripScripts(); if (receiver = $(receiver)) { if (this.options.insertion) new this.options.insertion(receiver, response); else receiver.update(response); } if (this.success()) { if (this.onComplete) setTimeout(this.onComplete.bind(this), 10); } } }); Ajax.PeriodicalUpdater = Class.create(); Ajax.PeriodicalUpdater.prototype = Object.extend(new Ajax.Base(), { initialize: function(container, url, options) { this.setOptions(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(request) { if (this.options.decay) { this.decay = (request.responseText == this.lastText ? this.decay * this.options.decay : 1); this.lastText = request.responseText; } this.timer = setTimeout(this.onTimerEvent.bind(this), this.decay * this.frequency * 1000); }, 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 (typeof element == 'string') element = document.getElementById(element); return Element.extend(element); } if (Prototype.BrowserFeatures.XPath) { document._getElementsByXPath = function(expression, parentElement) { var results = []; var query = document.evaluate(expression, $(parentElement) || document, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null); for (var i = 0, length = query.snapshotLength; i < length; i++) results.push(query.snapshotItem(i)); return results; }; document.getElementsByClassName = function(className, parentElement) { var q = ".//*[contains(concat(' ', @class, ' '), ' " + className + " ')]"; return document._getElementsByXPath(q, parentElement); } } else document.getElementsByClassName = function(className, parentElement) { var children = ($(parentElement) || document.body).getElementsByTagName('*'); var elements = [], child; for (var i = 0, length = children.length; i < length; i++) { child = children[i]; if (Element.hasClassName(child, className)) elements.push(Element.extend(child)); } return elements; }; /*--------------------------------------------------------------------------*/ if (!window.Element) var Element = {}; Element.extend = function(element) { var F = Prototype.BrowserFeatures; if (!element || !element.tagName || element.nodeType == 3 || element._extended || F.SpecificElementExtensions || element == window) return element; var methods = {}, tagName = element.tagName, cache = Element.extend.cache, T = Element.Methods.ByTag; // extend methods for all tags (Safari doesn't need this) if (!F.ElementExtensions) { Object.extend(methods, Element.Methods), Object.extend(methods, Element.Methods.Simulated); } // extend methods for specific tags if (T[tagName]) Object.extend(methods, T[tagName]); for (var property in methods) { var value = methods[property]; if (typeof value == 'function' && !(property in element)) element[property] = cache.findOrStore(value); } element._extended = Prototype.emptyFunction; return element; }; Element.extend.cache = { findOrStore: function(value) { return this[value] = this[value] || function() { return value.apply(null, [this].concat($A(arguments))); } } }; 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).style.display = 'none'; return element; }, show: function(element) { $(element).style.display = ''; return element; }, remove: function(element) { element = $(element); element.parentNode.removeChild(element); return element; }, update: function(element, html) { html = typeof html == 'undefined' ? '' : html.toString(); $(element).innerHTML = html.stripScripts(); setTimeout(function() {html.evalScripts()}, 10); return element; }, replace: function(element, html) { element = $(element); html = typeof html == 'undefined' ? '' : html.toString(); if (element.outerHTML) { element.outerHTML = html.stripScripts(); } else { var range = element.ownerDocument.createRange(); range.selectNodeContents(element); element.parentNode.replaceChild( range.createContextualFragment(html.stripScripts()), element); } setTimeout(function() {html.evalScripts()}, 10); return element; }, 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('parentNode'); }, descendants: function(element) { return $A($(element).getElementsByTagName('*')).each(Element.extend); }, 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('previousSibling'); }, nextSiblings: function(element) { return $(element).recursivelyCollect('nextSibling'); }, siblings: function(element) { element = $(element); return element.previousSiblings().reverse().concat(element.nextSiblings()); }, match: function(element, selector) { if (typeof selector == 'string') selector = new Selector(selector); return selector.match($(element)); }, up: function(element, expression, index) { element = $(element); if (arguments.length == 1) return $(element.parentNode); var ancestors = element.ancestors(); return expression ? Selector.findElement(ancestors, expression, index) : ancestors[index || 0]; }, down: function(element, expression, index) { element = $(element); if (arguments.length == 1) return element.firstDescendant(); var descendants = element.descendants(); return expression ? Selector.findElement(descendants, expression, index) : descendants[index || 0]; }, previous: function(element, expression, index) { element = $(element); if (arguments.length == 1) return $(Selector.handlers.previousElementSibling(element)); var previousSiblings = element.previousSiblings(); return expression ? Selector.findElement(previousSiblings, expression, index) : previousSiblings[index || 0]; }, next: function(element, expression, index) { element = $(element); if (arguments.length == 1) return $(Selector.handlers.nextElementSibling(element)); var nextSiblings = element.nextSiblings(); return expression ? Selector.findElement(nextSiblings, expression, index) : nextSiblings[index || 0]; }, getElementsBySelector: function() { var args = $A(arguments), element = $(args.shift()); return Selector.findChildElements(element, args); }, getElementsByClassName: function(element, className) { return document.getElementsByClassName(className, element); }, readAttribute: function(element, name) { element = $(element); if (Prototype.Browser.IE) { if (!element.attributes) return null; var t = Element._attributeTranslations; if (t.values[name]) return t.values[name](element, name); if (t.names[name]) name = t.names[name]; var attribute = element.attributes[name]; return attribute ? attribute.nodeValue : null; } return element.getAttribute(name); }, getHeight: function(element) { return $(element).getDimensions().height; }, getWidth: function(element) { return $(element).getDimensions().width; }, classNames: function(element) { return new Element.ClassNames(element); }, hasClassName: function(element, className) { if (!(element = $(element))) return; var elementClassName = element.className; if (elementClassName.length == 0) return false; if (elementClassName == className || elementClassName.match(new RegExp("(^|//s)" + className + "(//s|$)"))) return true; return false; }, addClassName: function(element, className) { if (!(element = $(element))) return; Element.classNames(element).add(className); return element; }, removeClassName: function(element, className) { if (!(element = $(element))) return; Element.classNames(element).remove(className); return element; }, toggleClassName: function(element, className) { if (!(element = $(element))) return; Element.classNames(element)[element.hasClassName(className) ? 'remove' : 'add'](className); return element; }, observe: function() { Event.observe.apply(Event, arguments); return $A(arguments).first(); }, stopObserving: function() { Event.stopObserving.apply(Event, arguments); return $A(arguments).first(); }, // removes whitespace-only text node children 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); while (element = element.parentNode) if (element == ancestor) return true; return false; }, scrollTo: function(element) { element = $(element); var pos = Position.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) { 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, camelized) { element = $(element); var elementStyle = element.style; for (var property in styles) if (property == 'opacity') element.setOpacity(styles[property]) else elementStyle[(property == 'float' || property == 'cssFloat') ? (elementStyle.styleFloat === undefined ? 'cssFloat' : 'styleFloat') : (camelized ? property : property.camelize())] = 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('display'); if (display != 'none' && display != null) // Safari bug return {width: element.offsetWidth, height: element.offsetHeight}; // All *Width and *Height properties give 0 on elements with display none, // so enable the element temporarily var els = element.style; var originalVisibility = els.visibility; var originalPosition = els.position; var originalDisplay = els.display; els.visibility = 'hidden'; 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'; // Opera returns the offset relative to the positioning context, when an // element is position relative but top and left have not been defined if (window.opera) { element.style.top = 0; element.style.left = 0; } } return element; },

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