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Verbotener Planet Mars

 
Von Hans-arthur Marsiske 1. Februar 2009, 03:32 Uhr

In 30 Jahren soll der Mars besiedelt werden. Jetzt ist Zeit für Fragen der Ethik. Müssen autarke Marssiedlungen politisch unabhängig sein? Und dürfen wir den Roten Planeten überhaupt kolonisieren, wenn es dort Leben gibt?

Als die US-Raumfahrtbehörde Nasa um die Jahreswende eine Pressemitteilung zum fünfjährigen Dienstjubiläum ihrer beiden Marsroboter "Spirit" und "Opportunity" verschickte, übernahmen die Medien weltweit eifrig die Meldung. Die Konsequenz: Alle Lobreden auf die ungewöhnliche Ausdauer der Mars Exploration Rover wurden eigentlich zum falschen Zeitpunkt gehalten.

Denn warum sollte man sich für eine Jubiläumsfeier auf dem Mars am Erdkalender orientieren? Fünf Marsjahre sind, wegen des fast doppelt so lange dauernden Umlaufs um die Sonne, noch lange nicht erreicht. Genau betrachtet zeigt also die in Himmelsangelegenheiten sonst sehr gut bewanderte Nasa einen eigentümlichen und falschen Geozentrismus.

Tatsächlich ließe sich ein anderes Jubiläum feiern. Denn die Wissenschaftler bei der Raumfahrtagentur haben für die Missionsplanung anfangs durchaus die Marszeit zugrunde gelegt: Auf eine Lebensdauer von 90 Sols (Marstage) waren die Rover ursprünglich ausgelegt. Ein Sol ist aber fast 40 Minuten länger als ein Erdtag. Die 20-fache Plan-Übererfüllung von 1800 Sol feierte die zuerst gelandete "Spirit" am letzten Sonntag. "Opportunitys" Ehrentag steht demnächst, am 15. Februar irdischer Zeit, an.

Der amerikanische Science-Fiction-Autor Kim Stanley Robinson hat aus der Differenz der planetaren Rhythmen den "Zeitschlupf" gemacht. In seiner Mars-Trilogie ("Roter Mars", "Grüner Mars", "Blauer Mars"), die von der Besiedelung des Roten Planeten erzählt, lässt Robinson um Mitternacht die Uhren für knapp 40 Minuten anhalten, um die Zeitrechnung auf dem Mars mit der irdischen abzustimmen. Den Menschen auf dem Mars erlaubt diese Lücke, jede Nacht eine Weile aus dem "erbarmungslosen Lauf des Sekundenzeigers" auszuscheren. Partys erreichen dann häufig ihren Höhepunkt.

40 Extraminuten täglich zum Feiern, Meditieren, Spielen oder Schlafen - das klingt erst einmal verlockend. Warum aber sollten die Uhren von Erde und Mars überhaupt synchronisiert werden? Warum sollte sich der Mars nach der Erde richten?

Es ist das alte Konzept von Zentrum und Peripherie, von Mutterland und Kolonie. Auf der Erde hat es regelmäßig zu schmerzhaften Abnabelungen geführt. Es gab spektakuläre Protestaktionen wie die Boston Tea Party von 1773 oder Mahatma Gandhis Salzmarsch. Aber meistens mündete der neuzeitliche Kolonialismus in Gewalt, Folter und Krieg. Es wäre geradezu idiotisch, diesen Irrweg demnächst im Weltall fortzusetzen.

Europa hat sein Weltraumlabor auf der Internationalen Raumstation (ISS) "Columbus" genannt und hat es damit zu einem historischen Mahnmal im Orbit gemacht. Es erinnert an den Wagemut und die Entschlossenheit europäischer Seefahrer - aber auch an das viele Leid, das die europäische Expansion über die Erde gebracht hat. Wer sich in die Tradition der europäischen Entdecker stellt, tritt damit auch ihr blutiges Erbe an und muss Wege benennen, wie solche Entwicklungen in Zukunft vermieden werden können. Eine wichtige Forderung ist die nach völliger Unabhängigkeit der zukünftigen Siedlungen im Weltraum.

Erste Städte auf dem Mond erwartet die "International Lunar Exploration Working Group" ab etwa 2060. Schon aus wirtschaftlichen Gründen dürfen sie auf Dauer nicht auf regelmäßige, teure Versorgungslieferungen von der Erde angewiesen sein, sondern müssen so bald wie möglich vollständige Autarkie erreichen. Die ist aufgrund der Mars-Ressourcen leichter erreichbar als etwa auf dem Mond. Die Autarkie muss durch eine uneingeschränkte politische Souveränität flankiert werden. Wenn die Bewohner einer Siedlung im All zu dem Schluss kommen, nunmehr auf eigenen Füßen stehen und mit ihren Ressourcen überleben zu können, sollten sie ihre Unabhängigkeit mit einer einfachen, formellen Erklärung feststellen können. Siedlungen im Weltraum sind keine Investitionen, es sind Kinder der Erde. Wenn sie reif genug sind, bestimmen sie allein ihren weiteren Lebensweg, ohne irgendwelche Verpflichtungen gegenüber dem Mutterplaneten.

Soll es im All eine kapitalistische Geldwirtschaft wie auf der Erde geben, die am Ende womöglich auch die Atemluft zu einer Ware macht? Oder soll den Menschen alles zum Leben Notwendige frei zugänglich sein? Die Entscheidung darüber darf nicht auf der Erde getroffen werden, es ist einzig und allein Angelegenheit der Weltraumbewohner, ebenso wie der Takt, in dem ihre Uhren ticken.

Das traurigste Kapitel der irdischen Kolonialgeschichte ist indessen der Umgang mit Ureinwohnern. Niemand kann ernsthaft wollen, dass sich Völkermorde und Massenversklavungen wie im Gefolge der europäischen Entdeckungsreisen noch einmal wiederholen. Ureinwohner auf dem Mars? Ist der Vergleich mit der Erde in diesem Fall nicht absurd? Konsequent gedacht: nein.

In der Science-Fiction wird häufig ein Nichteinmischungsprinzip postuliert, so etwa in der Fernsehserie "Star Trek". Dort gilt für die Mitglieder der Vereinigten Föderation der Planeten ein prinzipielles Verbot, auf die Entwicklung einer Zivilisation Einfluss zu nehmen. Ein gutes Modell für die Realität. Der Mars, der unlängst von der US-basierten Lobbyorganisation "Planetary Society" als vorrangiges Ziel für bemannte Missionen propagiert wurde, könnte sich daher als ungeeignet für eine Besiedelung durch Menschen erweisen. Zwar rechnet niemand ernsthaft damit, auf unserem Nachbarplaneten eine hoch entwickelte Zivilisation zu finden, wie es etwa Ray Bradbury in den 1940er-Jahren in seinen "Mars-Chroniken" beschrieben hat. Viele Wissenschaftler halten es aber für möglich, dass sich wenige Meter unter der Oberfläche und in anderen geschützten Bereichen Mikroorganismen erhalten haben. Erst vor Kurzem berichteten US-Forscher von Methan-Konzentrationen in der Marsatmosphäre, die auf biologische Aktivitäten deuten.

Wer Columbus' Fehler vermeiden will, muss jegliche auf dem Mars existierende Lebensform als Besitzer des Planeten ansehen und respektieren. Das Argument, es handle sich "nur" um Mikroben, greift nicht. Schließlich wurden die Verbrechen gegen die Ureinwohner Amerikas und anderer Kontinente auch damit gerechtfertigt, dass sie nicht als vollwertige Menschen eingestuft wurden. Vielleicht bilden die vermeintlich "primitiven" Mikroorganismen ja gemeinsam einen Superorganismus, sind womöglich die Nervenzellen eines planetaren Gehirns, also viel höher entwickelt, als es auf den ersten Blick erscheint. Wissen wir's?

Forscher wie der britische Mikrobiologe Charles Cockell haben gefordert, außerirdisches Leben bis zum Beweis des Gegenteils grundsätzlich als intelligent und leidensfähig anzusehen. Das heißt auch, dass wir einen von Lebewesen jeglicher Art bewohnten Planeten nicht betreten dürfen, es sei denn, wir würden klar und unmissverständlich dazu eingeladen oder durch einen Notfall gezwungen.

Falls die Robotersonden, die in den kommenden Jahren auf unserem Nachbarplaneten nach Leben suchen, tatsächlich fündig werden sollten, wäre eine Landung von Menschen daher bis auf Weiteres moralisch nicht vertretbar, die Landung weiterer Roboter fraglich. Wir müssten uns zunächst auf die Beobachtung aus der Umlaufbahn beschränken.

Es wäre sicherlich nicht leicht, auf den Mars als Ziel bemannter Missionen zu verzichten, bietet er doch aufgrund seiner Rohstoffe in unserer kosmischen Nachbarschaft die besten Bedingungen für eine permanente menschliche Präsenz. Die Ansiedlung etwa auf den Marsmonden dürfte dagegen erheblich schwieriger werden. Aber der einfachste Weg ist nicht immer der beste. US-Präsident John F. Kennedy begründete das Apollo-Programm 1962 mit den Worten: "Wir haben uns entschlossen, zum Mond zu fliegen (...) nicht weil es leicht ist, sondern weil es schwer ist; weil uns dieses Ziel dazu dienen wird, das Beste aus unseren Energien und Fähigkeiten herauszuholen und sinnvoll einzusetzen."

Das ist auch für den jetzt bevorstehenden erneuten Aufbruch ins All eine gute Leitlinie. Wobei wir es uns nicht nur in technologischer Hinsicht schwer machen sollten, sondern vor allem in geistig-moralischer. Wir haben im All die Chance, ausgetretene Pfade zu verlassen und kulturell, sozial und politisch neue Wege zu beschreiten. Das erfordert größere Anstrengungen als die Fortschreibung des Status quo, wird aber jede Mühe wert sein.

Arthur C. Clarke hat in seiner berühmten Kurzgeschichte "The Sentinel" - sie inspirierte Stanley Kubrick zu seinem Film "2001: Odyssee im Weltraum" - beschrieben, wie die Menschen auf dem Mond die Hinterlassenschaft einer alten Zivilisation finden.

Vielleicht entwickelt sich die Geschichte genau umgekehrt: Jahrmillionen in der Zukunft mögen sich die Mikroben des Mars zu komplexeren Lebensformen entwickelt und Raumschiffe gebaut haben - und entdecken auf den Marsmonden die Überreste menschlicher Forschungsstationen, von denen aus sie jahrtausendelang beobachtet wurden. Ist das für die menschliche Erkundung des Weltraums nicht ein viel erhabeneres Ziel als die Ausbeutung anderer Welten für schnöde irdische Profite?

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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.isElement(object)) 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(', ') + '}'; }, toQueryString: function(object) { return $H(object).toQueryString(); }, toHTML: function(object) { return object && object.toHTML ? object.toHTML() : String.interpret(object); }, 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); }, isElement: function(object) { return object && object.nodeType == 1; }, isArray: function(object) { return object && object.constructor === Array; }, isHash: function(object) { return object instanceof Hash; }, isFunction: function(object) { return typeof object == "function"; }, isString: function(object) { return typeof object == "string"; }, isNumber: function(object) { return typeof object == "number"; }, isUndefined: function(object) { return typeof object == "undefined"; } }); Object.extend(Function.prototype, { argumentNames: function() { var names = this.toString().match(/^[\s\(]*function[^(]*\((.*?)\)/)[1].split(",").invoke("strip"); return names.length == 1 && !names[0] ? [] : names; }, bind: function() { if (arguments.length < 2 && arguments[0] === undefined) return this; var __method = this, args = $A(arguments), object = args.shift(); return function() { return __method.apply(object, args.concat($A(arguments))); } }, bindAsEventListener: function() { var __method = this, args = $A(arguments), object = args.shift(); return function(event) { return __method.apply(object, [event || window.event].concat(args)); } }, curry: function() { if (!arguments.length) return this; var __method = this, args = $A(arguments); return function() { return __method.apply(this, args.concat($A(arguments))); } }, delay: function() { var __method = this, args = $A(arguments), timeout = args.shift() * 1000; return window.setTimeout(function() { return __method.apply(__method, args); }, timeout); }, wrap: function(wrapper) { var __method = this; return function() { return wrapper.apply(this, [__method.bind(this)].concat($A(arguments))); } }, methodize: function() { if (this._methodized) return this._methodized; var __method = this; return this._methodized = function() { return __method.apply(null, [this].concat($A(arguments))); }; } }); Function.prototype.defer = Function.prototype.delay.curry(0.01); Date.prototype.toJSON = function() { return '"' + this.getUTCFullYear() + '-' + (this.getUTCMonth() + 1).toPaddedString(2) + '-' + this.getUTCDate().toPaddedString(2) + 'T' + this.getUTCHours().toPaddedString(2) + ':' + this.getUTCMinutes().toPaddedString(2) + ':' + this.getUTCSeconds().toPaddedString(2) + 'Z"'; }; var Try = { these: function() { var returnValue; for (var i = 0, length = arguments.length; i < length; i++) { var lambda = arguments[i]; try { returnValue = lambda(); break; } catch (e) { } } return returnValue; } }; RegExp.prototype.match = RegExp.prototype.test; RegExp.escape = function(str) { return String(str).replace(/([.*+?^=!:${}()|[\]\/\\])/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(); } 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 String(this); }, truncate: function(length, truncation) { length = length || 30; truncation = truncation === undefined ? '...' : truncation; return this.length > length ? this.slice(0, length - truncation.length) + truncation : String(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 = new Element('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 (!Object.isArray(hash[key])) 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) { return count < 1 ? '' : new Array(count + 1).join(this); }, 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}'); }, isJSON: function() { var str = this.replace(/\\./g, '@').replace(/"[^"\\\n\r]*"/g, ''); return (/^[,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t]*$/).test(str); }, evalJSON: function(sanitize) { var json = this.unfilterJSON(); try { if (!sanitize || json.isJSON()) return eval('(' + json + ')'); } catch (e) { } throw new SyntaxError('Badly formed JSON string: ' + this.inspect()); }, include: function(pattern) { return this.indexOf(pattern) > -1; }, startsWith: function(pattern) { return this.indexOf(pattern) === 0; }, endsWith: function(pattern) { var d = this.length - pattern.length; return d >= 0 && this.lastIndexOf(pattern) === d; }, empty: function() { return this == ''; }, blank: function() { return /^\s*$/.test(this); }, interpolate: function(object, pattern) { return new Template(this, pattern).evaluate(object); } }); if (Prototype.Browser.WebKit || Prototype.Browser.IE) Object.extend(String.prototype, { escapeHTML: function() { return this.replace(/&/g,'&').replace(//g,'>'); }, unescapeHTML: function() { return this.replace(/&/g,'&').replace(/</g,'<').replace(/>/g,'>'); } }); String.prototype.gsub.prepareReplacement = function(replacement) { if (Object.isFunction(replacement)) 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({ initialize: function(template, pattern) { this.template = template.toString(); this.pattern = pattern || Template.Pattern; }, evaluate: function(object) { if (Object.isFunction(object.toTemplateReplacements)) object = object.toTemplateReplacements(); return this.template.gsub(this.pattern, function(match) { if (object == null) return ''; 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].gsub('\\\\]', ']') : 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); }.bind(this)); } }); Template.Pattern = /(^|.|\r|\n)(#\{(.*?)\})/; var $break = { }; var Enumerable = { each: function(iterator, context) { var index = 0; iterator = iterator.bind(context); try { this._each(function(value) { iterator(value, index++); }); } catch (e) { if (e != $break) throw e; } return this; }, eachSlice: function(number, iterator, context) { iterator = iterator ? iterator.bind(context) : Prototype.K; var index = -number, slices = [], array = this.toArray(); while ((index += number) < array.length) slices.push(array.slice(index, index+number)); return slices.collect(iterator, context); }, all: function(iterator, context) { iterator = iterator ? iterator.bind(context) : Prototype.K; var result = true; this.each(function(value, index) { result = result && !!iterator(value, index); if (!result) throw $break; }); return result; }, any: function(iterator, context) { iterator = iterator ? iterator.bind(context) : Prototype.K; var result = false; this.each(function(value, index) { if (result = !!iterator(value, index)) throw $break; }); return result; }, collect: function(iterator, context) { iterator = iterator ? iterator.bind(context) : Prototype.K; var results = []; this.each(function(value, index) { results.push(iterator(value, index)); }); return results; }, detect: function(iterator, context) { iterator = iterator.bind(context); var result; this.each(function(value, index) { if (iterator(value, index)) { result = value; throw $break; } }); return result; }, findAll: function(iterator, context) { iterator = iterator.bind(context); var results = []; this.each(function(value, index) { if (iterator(value, index)) results.push(value); }); return results; }, grep: function(filter, iterator, context) { iterator = iterator ? iterator.bind(context) : Prototype.K; var results = []; if (Object.isString(filter)) filter = new RegExp(filter); this.each(function(value, index) { if (filter.match(value)) results.push(iterator(value, index)); }); return results; }, include: function(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; }, 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, context) { iterator = iterator.bind(context); 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, context) { iterator = iterator ? iterator.bind(context) : Prototype.K; var result; this.each(function(value, index) { value = iterator(value, index); if (result == undefined || value >= result) result = value; }); return result; }, min: function(iterator, context) { iterator = iterator ? iterator.bind(context) : Prototype.K; var result; this.each(function(value, index) { value = iterator(value, index); if (result == undefined || value < result) result = value; }); return result; }, partition: function(iterator, context) { iterator = iterator ? iterator.bind(context) : Prototype.K; var trues = [], falses = []; this.each(function(value, index) { (iterator(value, index) ? trues : falses).push(value); }); return [trues, falses]; }, pluck: function(property) { var results = []; this.each(function(value) { results.push(value[property]); }); return results; }, reject: function(iterator, context) { iterator = iterator.bind(context); var results = []; this.each(function(value, index) { if (!iterator(value, index)) results.push(value); }); return results; }, sortBy: function(iterator, context) { iterator = iterator.bind(context); 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 = $A(arguments); if (Object.isFunction(args.last())) iterator = args.pop(); var collections = [this].concat(args).map($A); return this.map(function(value, index) { return iterator(collections.pluck(index)); }); }, size: function() { return this.toArray().length; }, inspect: function() { return '#'; } }; Object.extend(Enumerable, { map: Enumerable.collect, find: Enumerable.detect, select: Enumerable.findAll, filter: Enumerable.findAll, member: Enumerable.include, entries: Enumerable.toArray, every: Enumerable.all, some: Enumerable.any }); function $A(iterable) { if (!iterable) return []; if (iterable.toArray) return iterable.toArray(); var length = iterable.length, results = new Array(length); while (length--) results[length] = iterable[length]; return results; } if (Prototype.Browser.WebKit) { function $A(iterable) { if (!iterable) return []; if (!(Object.isFunction(iterable) && iterable == '[object NodeList]') && iterable.toArray) return iterable.toArray(); var length = iterable.length, results = new Array(length); while (length--) results[length] = iterable[length]; return results; } } Array.from = $A; 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(Object.isArray(value) ? value.flatten() : [value]); }); }, without: function() { var values = $A(arguments); return this.select(function(value) { return !values.include(value); }); }, 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; }); }, intersect: function(array) { return this.uniq().findAll(function(item) { return array.detect(function(value) { return item === value }); }); }, 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(', ') + ']'; } }); // use native browser JS 1.6 implementation if available if (Object.isFunction(Array.prototype.forEach)) Array.prototype._each = Array.prototype.forEach; if (!Array.prototype.indexOf) Array.prototype.indexOf = function(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; }; if (!Array.prototype.lastIndexOf) Array.prototype.lastIndexOf = function(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; }; Array.prototype.toArray = Array.prototype.clone; function $w(string) { if (!Object.isString(string)) return []; 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 (Object.isArray(arguments[i])) { for (var j = 0, arrayLength = arguments[i].length; j < arrayLength; j++) array.push(arguments[i][j]); } else { array.push(arguments[i]); } } return array; }; } 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'; } }); $w('abs round ceil floor').each(function(method){ Number.prototype[method] = Math[method].methodize(); }); function $H(object) { return new Hash(object); }; var Hash = Class.create(Enumerable, (function() { 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; }()) { function each(iterator) { var cache = []; for (var key in this._object) { var value = this._object[key]; if (cache.include(key)) continue; cache.push(key); var pair = [key, value]; pair.key = key; pair.value = value; iterator(pair); } } } else { 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 toQueryPair(key, value) { if (Object.isUndefined(value)) return key; return key + '=' + encodeURIComponent(String.interpret(value)); } return { initialize: function(object) { this._object = Object.isHash(object) ? object.toObject() : Object.clone(object); }, _each: each, set: function(key, value) { return this._object[key] = value; }, get: function(key) { return this._object[key]; }, unset: function(key) { var value = this._object[key]; delete this._object[key]; return value; }, toObject: function() { return Object.clone(this._object); }, keys: function() { return this.pluck('key'); }, values: function() { return this.pluck('value'); }, index: function(value) { var match = this.detect(function(pair) { return pair.value === value; }); return match && match.key; }, merge: function(object) { return this.clone().update(object); }, update: function(object) { return new Hash(object).inject(this, function(result, pair) { result.set(pair.key, pair.value); return result; }); }, toQueryString: function() { return this.map(function(pair) { var key = encodeURIComponent(pair.key), values = pair.value; if (values && typeof values == 'object') { if (Object.isArray(values)) return values.map(toQueryPair.curry(key)).join('&'); } return toQueryPair(key, values); }).join('&'); }, inspect: function() { return '#'; }, toJSON: function() { return Object.toJSON(this.toObject()); }, clone: function() { return new Hash(this); } } })()); Hash.prototype.toTemplateReplacements = Hash.prototype.toObject; Hash.from = $H; var ObjectRange = Class.create(Enumerable, { 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 $R = function(start, end, exclusive) { return new ObjectRange(start, end, exclusive); }; var Ajax = { getTransport: function() { return Try.these( function() {return new XMLHttpRequest()}, function() {return new ActiveXObject('Msxml2.XMLHTTP')}, function() {return new ActiveXObject('Microsoft.XMLHTTP')} ) || false; }, activeRequestCount: 0 }; Ajax.Responders = { responders: [], _each: function(iterator) { this.responders._each(iterator); }, register: function(responder) { if (!this.include(responder)) this.responders.push(responder); }, unregister: function(responder) { this.responders = this.responders.without(responder); }, dispatch: function(callback, request, transport, json) { this.each(function(responder) { if (Object.isFunction(responder[callback])) { try { responder[callback].apply(responder, [request, transport, json]); } catch (e) { } } }); } }; Object.extend(Ajax.Responders, Enumerable); Ajax.Responders.register({ onCreate: function() { Ajax.activeRequestCount++ }, onComplete: function() { Ajax.activeRequestCount-- } }); Ajax.Base = Class.create({ initialize: function(options) { this.options = { method: 'post', asynchronous: true, contentType: 'application/x-www-form-urlencoded', encoding: 'UTF-8', parameters: '', evalJSON: true, evalJS: true }; Object.extend(this.options, options || { }); this.options.method = this.options.method.toLowerCase(); if (Object.isString(this.options.parameters)) this.options.parameters = this.options.parameters.toQueryParams(); } }); Ajax.Request = Class.create(Ajax.Base, { _complete: false, initialize: function($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)) { // simulate other verbs over post params['_method'] = this.method; this.method = 'post'; } this.parameters = params; if (params = Object.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 { 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'; } // user-defined headers 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 $H(extras).each(function(pair) { headers[pair.key] = pair.value }); } for (var name in headers) this.transport.setRequestHeader(name, headers[name]); }, success: function() { var status = this.getStatus(); return !status || (status >= 200 && status < 300); }, getStatus: function() { try { return this.transport.status || 0; } catch (e) { return 0 } }, respondToReadyState: function(readyState) { var state = Ajax.Request.Events[readyState], response = new Ajax.Response(this); if (state == 'Complete') { try { this._complete = true; (this.options['on' + response.status] || this.options['on' + (this.success() ? 'Success' : 'Failure')] || Prototype.emptyFunction)(response, response.headerJSON); } catch (e) { this.dispatchException(e); } var contentType = response.getHeader('Content-type'); if (this.options.evalJS == 'force' || (this.options.evalJS && contentType && contentType.match(/^\s*(text|application)\/(x-)?(java|ecma)script(;.*)?\s*$/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') { // 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 } }, 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 = xml === undefined ? 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); } 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'))) return null; try { return this.transport.responseText.evalJSON(options.sanitizeJSON); } 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 = options || { }; var onComplete = options.onComplete; options.onComplete = (function(response, param) { this.updateContent(response.responseText); if (Object.isFunction(onComplete)) onComplete(response, param); }).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 = $(receiver)) { if (options.insertion) { if (Object.isString(options.insertion)) { var insertion = { }; insertion[options.insertion] = responseText; receiver.insert(insertion); } else options.insertion(receiver, responseText); } else receiver.update(responseText); } if (this.success()) { if (this.onComplete) this.onComplete.bind(this).defer(); } } }); Ajax.PeriodicalUpdater = Class.create(Ajax.Base, { initialize: function($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) { // DOM level 2 ECMAScript Language Binding 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() { var element = this.Element; this.Element = function(tagName, attributes) { attributes = attributes || { }; tagName = tagName.toLowerCase(); var cache = Element.cache; if (Prototype.Browser.IE && 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(this.Element, element || { }); }).call(window); Element.cache = { }; 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, content) { element = $(element); if (content && content.toElement) content = content.toElement(); if (Object.isElement(content)) return element.update().insert(content); content = Object.toHTML(content); element.innerHTML = content.stripScripts(); content.evalScripts.bind(content).defer(); return element; }, 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, t, range; for (position in insertions) { content = insertions[position]; position = position.toLowerCase(); t = Element._insertionTranslations[position]; if (content && content.toElement) content = content.toElement(); if (Object.isElement(content)) { t.insert(element, content); continue; } content = Object.toHTML(content); range = element.ownerDocument.createRange(); t.initializeRange(element, range); t.insert(element, range.createContextualFragment(content.stripScripts())); 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('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 = $(element); return element.previousSiblings().reverse().concat(element.nextSiblings()); }, match: function(element, selector) { if (Object.isString(selector)) selector = new Selector(selector); return selector.match($(element)); }, up: function(element, expression, index) { element = $(element); if (arguments.length == 1) return $(element.parentNode); var ancestors = element.ancestors(); 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]; }, select: function() { var args = $A(arguments), element = $(args.shift()); return Selector.findChildElements(element, args); }, adjacent: function() { var args = $A(arguments), element = $(args.shift()); return Selector.findChildElements(element.parentNode, args).without(element); }, identify: function(element) { element = $(element); var id = element.readAttribute('id'), self = arguments.callee; if (id) return id; do { id = 'anonymous_element_' + self.counter++ } while ($(id)); element.writeAttribute('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] = value === undefined ? true : value; for (var attr in attributes) { var 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().height; }, getWidth: function(element) { return $(element).getDimensions().width; }, classNames: function(element) { return new Element.ClassNames(element); }, hasClassName: function(element, className) { if (!(element = $(element))) return; var elementClassName = element.className; return (elementClassName.length > 0 && (elementClassName == className || new RegExp("(^|\\s)" + className + "(\\s|$)").test(elementClassName))); }, addClassName: function(element, className) { if (!(element = $(element))) return; if (!element.hasClassName(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(className) ? 'removeClassName' : 'addClassName'](className); }, // 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); if (element.compareDocumentPosition) return (element.compareDocumentPosition(ancestor) & 8) === 8; if (element.sourceIndex && !Prototype.Browser.Opera) { var e = element.sourceIndex, a = ancestor.sourceIndex, nextAncestor = ancestor.nextSibling; if (!nextAncestor) { do { ancestor = ancestor.parentNode; } while (!(nextAncestor = ancestor.nextSibling) && ancestor.parentNode); } if (nextAncestor) return (e > a && e < nextAncestor.sourceIndex); } while (element = element.parentNode) if (element == ancestor) return true; return false; }, scrollTo: function(element) { element = $(element); var pos = element.cumulativeOffset(); 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) { 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') ? (elementStyle.styleFloat === undefined ? '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('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; }, 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 == 'BODY') break; var p = Element.getStyle(element, 'position'); if (p == 'relative' || p == 'absolute') break; } } while (element); return Element._returnOffset(valueL, valueT); }, absolutize: function(element) { element = $(element); if (element.getStyle('position') == 'absolute') return; // Position.prepare(); // To be done manually by Scripty when it needs it. var offsets = element.positionedOffset(); 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('position') == 'relative') return; // Position.prepare(); // To be done manually by Scripty when it needs it. 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; // Safari fix if (element.offsetParent == document.body && Element.getStyle(element, 'position') == 'absolute') break; } while (element = element.offsetParent); element = forElement; do { if (!Prototype.Browser.Opera || element.tagName == '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] || { }); // find page position of source source = $(source); var p = source.viewportOffset(); // find coordinate system to use element = $(element); var delta = [0, 0]; var parent = null; // delta [0,0] will do fine with position: fixed elements, // position:absolute needs offsetParent deltas if (Element.getStyle(element, 'position') == 'absolute') { parent = element.getOffsetParent(); delta = parent.viewportOffset(); } // correct by body offsets (fixes Safari) if (parent == document.body) { delta[0] -= document.body.offsetLeft; delta[1] -= document.body.offsetTop; } // set position 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; } }; Element.Methods.identify.counter = 1; Object.extend(Element.Methods, { getElementsBySelector: Element.Methods.select, childElements: Element.Methods.immediateDescendants }); Element._attributeTranslations = { write: { names: { className: 'class', htmlFor: 'for' }, values: { } } }; if (!document.createRange || Prototype.Browser.Opera) { Element.Methods.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 t = Element._insertionTranslations, content, position, pos, tagName; for (position in insertions) { content = insertions[position]; position = position.toLowerCase(); pos = t[position]; if (content && content.toElement) content = content.toElement(); if (Object.isElement(content)) { pos.insert(element, content); continue; } content = Object.toHTML(content); tagName = ((position == 'before' || position == 'after') ? element.parentNode : element).tagName.toUpperCase(); if (t.tags[tagName]) { var fragments = Element._getContentFromAnonymousElement(tagName, content.stripScripts()); if (position == 'top' || position == 'after') fragments.reverse(); fragments.each(pos.insert.curry(element)); } else element.insertAdjacentHTML(pos.adjacency, content.stripScripts()); content.evalScripts.bind(content).defer(); } return element; }; } if (Prototype.Browser.Opera) { Element.Methods._getStyle = Element.Methods.getStyle; Element.Methods.getStyle = function(element, style) { switch(style) { case 'left': case 'top': case 'right': case 'bottom': if (Element._getStyle(element, 'position') == 'static') return null; default: return Element._getStyle(element, style); } }; Element.Methods._readAttribute = Element.Methods.readAttribute; Element.Methods.readAttribute = function(element, attribute) { if (attribute == 'title') return element.title; return Element._readAttribute(element, attribute); }; } else if (Prototype.Browser.IE) { $w('positionedOffset getOffsetParent viewportOffset').each(function(method) { Element.Methods[method] = Element.Methods[method].wrap( function(proceed, element) { element = $(element); 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; } ); }); 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 = { read: { names: { 'class': 'className', 'for': 'htmlFor' }, values: { _getAttr: function(element, attribute) { return element.getAttribute(attribute, 2); }, _getAttrNode: function(element, attribute) { var node = element.getAttributeNode(attribute); return node ? node.value : ""; }, _getEv: function(element, attribute) { var attribute = element.getAttribute(attribute); return attribute ? attribute.toString().slice(23, -2) : null; }, _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.clone(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').each(function(attr) { Element._attributeTranslations.write.names[attr.toLowerCase()] = attr; Element._attributeTranslations.has[attr.toLowerCase()] = attr; }); (function(v) { Object.extend(v, { href: v._getAttr, src: v._getAttr, 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); } 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 == 'IMG' && element.width) { element.width++; element.width--; } else try { var n = document.createTextNode(' '); element.appendChild(n); element.removeChild(n); } catch (e) { } return element; }; // Safari returns margins on body which is incorrect if the child is absolutely // positioned. For performance reasons, redefine Position.cumulativeOffset for // KHTML/WebKit only. 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 (Prototype.Browser.IE || Prototype.Browser.Opera) { // IE and Opera are missing .innerHTML support for TABLE-related and SELECT elements Element.Methods.update = function(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 in Element._insertionTranslations.tags) { $A(element.childNodes).each(function(node) { element.removeChild(node) }); Element._getContentFromAnonymousElement(tagName, content.stripScripts()) .each(function(node) { element.appendChild(node) }); } else element.innerHTML = content.stripScripts(); content.evalScripts.bind(content).defer(); return element; }; } if (document.createElement('div').outerHTML) { 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]; div.innerHTML = t[0] + html + t[1]; t[2].times(function() { div = div.firstChild }); return $A(div.childNodes); }; Element._insertionTranslations = { before: { adjacency: 'beforeBegin', insert: function(element, node) { element.parentNode.insertBefore(node, element); }, initializeRange: function(element, range) { range.setStartBefore(element); } }, top: { adjacency: 'afterBegin', insert: function(element, node) { element.insertBefore(node, element.firstChild); }, initializeRange: function(element, range) { range.selectNodeContents(element); range.collapse(true); } }, bottom: { adjacency: 'beforeEnd', insert: function(element, node) { element.appendChild(node); } }, after: { adjacency: 'afterEnd', insert: function(element, node) { element.parentNode.insertBefore(node, element.nextSibling); }, initializeRange: function(element, range) { range.setStartAfter(element); } }, tags: { TABLE: ['', '
', 1], TBODY: ['', '
', 2], TR: ['', '
', 3], TD: ['
', '
', 4], SELECT: ['', 1] } }; (function() { this.bottom.initializeRange = this.top.initializeRange; Object.extend(this.tags, { THEAD: this.tags.TBODY, TFOOT: this.tags.TBODY, TH: this.tags.TD }); }).call(Element._insertionTranslations); 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); if (!Prototype.BrowserFeatures.ElementExtensions && document.createElement('div').__proto__) { window.HTMLElement = { }; window.HTMLElement.prototype = document.createElement('div').__proto__; Prototype.BrowserFeatures.ElementExtensions = true; } Element.extend = (function() { if (Prototype.BrowserFeatures.SpecificElementExtensions) return Prototype.K; var Methods = { }, ByTag = Element.Methods.ByTag; var extend = Object.extend(function(element) { if (!element || element._extendedByPrototype || element.nodeType != 1 || element == window) return element; var methods = Object.clone(Methods), tagName = element.tagName, property, value; // extend methods for specific tags if (ByTag[tagName]) Object.extend(methods, ByTag[tagName]); for (property in methods) { value = methods[property]; if (Object.isFunction(value) && !(property in element)) element[property] = value.methodize(); } element._extendedByPrototype = Prototype.emptyFunction; return element; }, { refresh: function() { // extend methods for all tags (Safari doesn't need this) 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]; window[klass] = { }; window[klass].prototype = document.createElement(tagName).__proto__; return window[klass]; } if (F.ElementExtensions) { copy(Element.Methods, HTMLElement.prototype); copy(Element.Methods.Simulated, HTMLElement.prototype, 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() { var dimensions = { }; $w('width height').each(function(d) { var D = d.capitalize(); dimensions[d] = self['inner' + D] || (document.documentElement['client' + D] || document.body['client' + D]); }); return dimensions; }, getWidth: function() { return this.getDimensions().width; }, getHeight: function() { return this.getDimensions().height; }, getScrollOffsets: function() { return Element._returnOffset( window.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft, window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop); } }; /* 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(); this.compileMatcher(); }, compileMatcher: function() { // Selectors with namespaced attributes can't use the XPath version if (Prototype.BrowserFeatures.XPath && !(/(\[[\w-]*?:|:checked)/).test(this.expression)) return this.compileXPathMatcher(); var e = this.expression, ps = Selector.patterns, h = Selector.handlers, c = Selector.criteria, le, p, m; 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 in ps) { p = ps[i]; if (m = e.match(p)) { this.matcher.push(Object.isFunction(c[i]) ? c[i](m) : new Template(c[i]).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; if (Selector._cache[e]) { this.xpath = Selector._cache[e]; return; } this.matcher = ['.//*']; while (e && le != e && (/\S/).test(e)) { le = e; for (var i in ps) { if (m = e.match(ps[i])) { this.matcher.push(Object.isFunction(x[i]) ? x[i](m) : new Template(x[i]).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; if (this.xpath) return document._getElementsByXPath(this.xpath, root); return this.matcher(root); }, match: function(element) { this.tokens = []; var e = this.expression, ps = Selector.patterns, as = Selector.assertions; var le, p, m; while (e && le !== e && (/\S/).test(e)) { le = e; for (var i in ps) { p = ps[i]; if (m = e.match(p)) { // use the Selector.assertions methods unless the selector // is too complex. if (as[i]) { this.tokens.push([i, Object.clone(m)]); e = e.replace(m[0], ''); } else { // reluctantly do a document-wide search // and look for a match in the array 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 "#"; } }); 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: "[@#{1}]", attr: function(m) { 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}')]", '$=': "[substring(@#{1}, (string-length(@#{1}) - string-length('#{3}') + 1))='#{3}']", '*=': "[contains(@#{1}, '#{3}')]", '~=': "[contains(concat(' ', @#{1}, ' '), ' #{3} ')]", '|=': "[contains(concat('-', @#{1}, '-'), '-#{3}-')]" }, pseudos: { 'first-child': '[not(preceding-sibling::*)]', 'last-child': '[not(following-sibling::*)]', 'only-child': '[not(preceding-sibling::* or following-sibling::*)]', 'empty': "[count(*) = 0 and (count(text()) = 0 or translate(text(), ' \t\r\n', '') = '')]", 'checked': "[@checked]", 'disabled': "[@disabled]", 'enabled': "[not(@disabled)]", 'not': function(m) { var e = m[6], p = Selector.patterns, x = Selector.xpath, le, m, v; var exclusion = []; while (e && le != e && (/\S/).test(e)) { le = e; for (var i in p) { if (m = e.match(p[i])) { v = Object.isFunction(x[i]) ? x[i](m) : new Template(x[i]).evaluate(m); exclusion.push("(" + v.substring(1, v.length - 1) + ")"); e = e.replace(m[0], ''); break; } } } return "[not(" + exclusion.join(" and ") + ")]"; }, 'nth-child': function(m) { return Selector.xpath.pseudos.nth("(count(./preceding-sibling::*) + 1) ", m); }, 'nth-last-child': function(m) { return Selector.xpath.pseudos.nth("(count(./following-sibling::*) + 1) ", m); }, 'nth-of-type': function(m) { return Selector.xpath.pseudos.nth("position() ", m); }, 'nth-last-of-type': function(m) { return Selector.xpath.pseudos.nth("(last() + 1 - position()) ", m); }, 'first-of-type': function(m) { m[6] = "1"; return Selector.xpath.pseudos['nth-of-type'](m); }, 'last-of-type': function(m) { m[6] = "1"; return Selector.xpath.pseudos['nth-last-of-type'](m); }, 'only-of-type': function(m) { var p = Selector.xpath.pseudos; return p['first-of-type'](m) + p['last-of-type'](m); }, nth: function(fragment, m) { var mm, formula = m[6], predicate; if (formula == 'even') formula = '2n+0'; if (formula == 'odd') formula = '2n+1'; if (mm = formula.match(/^(\d+)$/)) // 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 = false;', attr: function(m) { m[3] = (m[5] || m[6]); return new Template('n = h.attr(n, r, "#{1}", "#{3}", "#{2}"); 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: { // combinators must be listed first // (and descendant needs to be last combinator) laterSibling: /^\s*~\s*/, child: /^\s*>\s*/, adjacent: /^\s*\+\s*/, descendant: /^\s/, // selectors follow tagName: /^\s*(\*|[\w\-]+)(\b|$)?/, id: /^#([\w\-\*]+)(\b|$)/, className: /^\.([\w\-\*]+)(\b|$)/, pseudo: /^:((first|last|nth|nth-last|only)(-child|-of-type)|empty|checked|(en|dis)abled|not)(\((.*?)\))?(\b|$|(?=\s)|(?=:))/, attrPresence: /^\[([\w]+)\]/, attr: /\[((?:[\w-]*:)?[\w-]+)\s*(?:([!^$*~|]?=)\s*((['"])([^\4]*?)\4|([^'"][^\]]*?)))?\]/ }, // for Selector.match and Element#match 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 Selector.operators[matches[2]](nodeValue, matches[3]); } }, handlers: { // UTILITY FUNCTIONS // joins two collections concat: function(a, b) { for (var i = 0, node; node = b[i]; i++) a.push(node); return a; }, // marks an array of nodes for counting mark: function(nodes) { for (var i = 0, node; node = nodes[i]; i++) node._counted = true; return nodes; }, unmark: function(nodes) { for (var i = 0, node; node = nodes[i]; i++) node._counted = undefined; return nodes; }, // mark each child node with its position (for nth calls) // "ofType" flag indicates whether we're indexing for nth-of-type // rather than nth-child index: function(parentNode, reverse, ofType) { parentNode._counted = true; 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._counted)) node.nodeIndex = j++; } } else { for (var i = 0, j = 1, nodes = parentNode.childNodes; node = nodes[i]; i++) if (node.nodeType == 1 && (!ofType || node._counted)) node.nodeIndex = j++; } }, // filters out duplicates and extends all nodes unique: function(nodes) { if (nodes.length == 0) return nodes; var results = [], n; for (var i = 0, l = nodes.length; i < l; i++) if (!(n = nodes[i])._counted) { n._counted = true; results.push(Element.extend(n)); } return Selector.handlers.unmark(results); }, // COMBINATOR FUNCTIONS 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, children = [], 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; }, // TOKEN FUNCTIONS tagName: function(nodes, root, tagName, combinator) { tagName = tagName.toUpperCase(); var results = [], h = Selector.handlers; if (nodes) { if (combinator) { // fastlane for ordinary descendant combinators 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() == tagName) results.push(node); return results; } else return root.getElementsByTagName(tagName); }, id: function(nodes, root, id, combinator) { var targetNode = $(id), h = Selector.handlers; if (!targetNode) return []; if (!nodes && root == document) return [targetNode]; 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) { if (!nodes) nodes = root.getElementsByTagName("*"); 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) { if (!nodes) nodes = root.getElementsByTagName("*"); 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); }, // handles the an+b logic getIndices: function(a, b, total) { if (a == 0) return b > 0 ? [b] : []; return $R(1, total).inject([], function(memo, i) { if (0 == (i - b) % a && (i - b) / a >= 0) memo.push(i); return memo; }); }, // handles nth(-last)-child, nth(-last)-of-type, and (first|last)-of-type nth: function(nodes, formula, root, reverse, ofType) { if (nodes.length == 0) return []; if (formula == 'even') formula = '2n+0'; if (formula == 'odd') formula = '2n+1'; var h = Selector.handlers, results = [], indexed = [], m; h.mark(nodes); for (var i = 0, node; node = nodes[i]; i++) { if (!node.parentNode._counted) { h.index(node.parentNode, reverse, ofType); indexed.push(node.parentNode); } } if (formula.match(/^\d+$/)) { // 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++) { // IE treats comments as element nodes if (node.tagName == '!' || (node.firstChild && !node.innerHTML.match(/^\s*$/))) continue; results.push(node); } return results; }, 'not': function(nodes, selector, root) { var h = Selector.handlers, selectorType, m; var exclusions = new Selector(selector).findElements(root); h.mark(exclusions); for (var i = 0, results = [], node; node = nodes[i]; i++) if (!node._counted) results.push(node); h.unmark(exclusions); return results; }, 'enabled': function(nodes, value, root) { for (var i = 0, results = [], node; node = nodes[i]; i++) if (!node.disabled) results.push(node); return results; }, 'disabled': function(nodes, value, root) { for (var i = 0, results = [], node; node = nodes[i]; i++) if (node.disabled) results.push(node); return results; }, 'checked': function(nodes, value, root) { for (var i = 0, results = [], node; node = nodes[i]; i++) if (node.checked) results.push(node); return results; } }, operators: { '=': function(nv, v) { return nv == v; }, '!=': function(nv, v) { return nv != v; }, '^=': function(nv, v) { return nv.startsWith(v); }, '$=': function(nv, v) { return nv.endsWith(v); }, '*=': function(nv, v) { return nv.include(v); }, '~=': function(nv, v) { return (' ' + nv + ' ').include(' ' + v + ' '); }, '|=': function(nv, v) { return ('-' + nv.toUpperCase() + '-').include('-' + v.toUpperCase() + '-'); } }, matchElements: function(elements, expression) { var matches = new Selector(expression).findElements(), h = Selector.handlers; h.mark(matches); for (var i = 0, results = [], element; element = elements[i]; i++) if (element._counted) 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) { var exprs = expressions.join(','), expressions = []; exprs.scan(/(([\w#:.~>+()\s-]+|\*|\[.*?\])+)\s*(,|$)/, function(m) { expressions.push(m[1].strip()); }); 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; } }); function $$() { return Selector.findChildElements(document, $A(arguments)); } var Form = { reset: function(form) { $(form).reset(); return form; }, serializeElements: function(elements, options) { if (typeof options != 'object') options = { hash: !!options }; else if (options.hash === undefined) 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 != 'submit' || (!submitted && submit !== false && (!submit || key == submit) && (submitted = true)))) { if (key in result) { // a key is already present; construct an array of values 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) { return $A($(form).getElementsByTagName('*')).inject([], function(elements, child) { if (Form.Element.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'].include(element.tagName.toLowerCase()); }); }, 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'].include(element.type))) element.select(); } catch (e) { } return element; }, disable: function(element) { element = $(element); element.blur(); element.disabled = true; return element; }, enable: function(element) { element = $(element); element.disabled = false; return element; } }; /*--------------------------------------------------------------------------*/ var Field = Form.Element; var $F = Form.Element.Methods.getValue; /*--------------------------------------------------------------------------*/ Form.Element.Serializers = { input: function(element, value) { switch (element.type.toLowerCase()) { case 'checkbox': case 'radio': return Form.Element.Serializers.inputSelector(element, value); default: return Form.Element.Serializers.textarea(element, value); } }, inputSelector: function(element, value) { if (value === undefined) return element.checked ? element.value : null; else element.checked = !!value; }, textarea: function(element, value) { if (value === undefined) return element.value; else element.value = value; }, select: function(element, index) { if (index === undefined) return this[element.type == 'select-one' ? 'selectOne' : 'selectMany'](element); else { var opt, value, single = !Object.isArray(index); for (var i = 0, length = element.length; i < length; i++) { opt = element.options[i]; value = this.optionValue(opt); if (single) { if (value == index) { opt.selected = true; return; } } else opt.selected = index.include(value); } } }, selectOne: function(element) { var index = element.selectedIndex; return index >= 0 ? this.optionValue(element.options[index]) : null; }, selectMany: function(element) { var values, length = element.length; if (!length) return null; for (var i = 0, values = []; i < length; i++) { var opt = element.options[i]; if (opt.selected) values.push(this.optionValue(opt)); } return values; }, optionValue: function(opt) { // extend element because hasAttribute may not be native return Element.extend(opt).hasAttribute('value') ? opt.value : opt.text; } }; /*--------------------------------------------------------------------------*/ Abstract.TimedObserver = Class.create(PeriodicalExecuter, { initialize: function($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); } }); if (!window.Event) var Event = { }; Object.extend(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: { }, relatedTarget: function(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); } }); Event.Methods = (function() { 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); }; } return { isLeftClick: function(event) { return isButton(event, 0) }, isMiddleClick: function(event) { return isButton(event, 1) }, isRightClick: function(event) { return isButton(event, 2) }, element: function(event) { var node = Event.extend(event).target; return Element.extend(node.nodeType == Node.TEXT_NODE ? node.parentNode : node); }, findElement: function(event, expression) { var element = Event.element(event); return element.match(expression) ? element : element.up(expression); }, pointer: function(event) { return { x: event.pageX || (event.clientX + (document.documentElement.scrollLeft || document.body.scrollLeft)), y: event.pageY || (event.clientY + (document.documentElement.scrollTop || document.body.scrollTop)) }; }, pointerX: function(event) { return Event.pointer(event).x }, pointerY: function(event) { return Event.pointer(event).y }, stop: function(event) { Event.extend(event); event.preventDefault(); event.stopPropagation(); event.stopped = true; } }; })(); Event.extend = (function() { var methods = Object.keys(Event.Methods).inject({ }, function(m, name) { m[name] = Event.Methods[name].methodize(); return m; }); if (Prototype.Browser.IE) { Object.extend(methods, { stopPropagation: function() { this.cancelBubble = true }, preventDefault: function() { this.returnValue = false }, inspect: function() { return "[object Event]" } }); return function(event) { if (!event) return false; if (event._extendedByPrototype) return event; event._extendedByPrototype = Prototype.emptyFunction; var pointer = Event.pointer(event); Object.extend(event, { target: event.srcElement, relatedTarget: Event.relatedTarget(event), pageX: pointer.x, pageY: pointer.y }); return Object.extend(event, methods); }; } else { Event.prototype = Event.prototype || document.createEvent("HTMLEvents").__proto__; Object.extend(Event.prototype, methods); return Prototype.K; } })(); Object.extend(Event, (function() { var cache = Event.cache; function getEventID(element) { if (element._eventID) return element._eventID; arguments.callee.id = arguments.callee.id || 1; return element._eventID = ++arguments.callee.id; } function getDOMEventName(eventName) { if (eventName && eventName.include(':')) return "dataavailable"; return eventName; } function getCacheForID(id) { return cache[id] = cache[id] || { }; } function getWrappersForEventName(id, eventName) { var c = getCacheForID(id); return c[eventName] = c[eventName] || []; } function createWrapper(element, eventName, handler) { var id = getEventID(element); var c = getWrappersForEventName(id, eventName); if (c.pluck("handler").include(handler)) return false; var wrapper = function(event) { if (!Event || !Event.extend || (event.eventName && event.eventName != eventName)) return false; Event.extend(event); handler.call(element, event) }; wrapper.handler = handler; c.push(wrapper); return wrapper; } function findWrapper(id, eventName, handler) { var c = getWrappersForEventName(id, eventName); return c.find(function(wrapper) { return wrapper.handler == handler }); } function destroyWrapper(id, eventName, handler) { var c = getCacheForID(id); if (!c[eventName]) return false; c[eventName] = c[eventName].without(findWrapper(id, eventName, handler)); } function destroyCache() { for (var id in cache) for (var eventName in cache[id]) cache[id][eventName] = null; } if (window.attachEvent) { window.attachEvent("onunload", destroyCache); } return { observe: function(element, eventName, handler) { element = $(element); var name = getDOMEventName(eventName); var wrapper = createWrapper(element, eventName, handler); if (!wrapper) return element; if (element.addEventListener) { element.addEventListener(name, wrapper, false); } else { element.attachEvent("on" + name, wrapper); } return element; }, stopObserving: function(element, eventName, handler) { element = $(element); var id = getEventID(element), name = getDOMEventName(eventName); if (!handler && eventName) { getWrappersForEventName(id, eventName).each(function(wrapper) { element.stopObserving(eventName, wrapper.handler); }); return element; } else if (!eventName) { Object.keys(getCacheForID(id)).each(function(eventName) { element.stopObserving(eventName); }); return element; } var wrapper = findWrapper(id, eventName, handler); if (!wrapper) return element; if (element.removeEventListener) { element.removeEventListener(name, wrapper, false); } else { element.detachEvent("on" + name, wrapper); } destroyWrapper(id, eventName, handler); return element; }, fire: function(element, eventName, memo) { element = $(element); if (element == document && document.createEvent && !element.dispatchEvent) element = document.documentElement; if (document.createEvent) { var event = document.createEvent("HTMLEvents"); event.initEvent("dataavailable", true, true); } else { var event = document.createEventObject(); event.eventType = "ondataavailable"; } event.eventName = eventName; event.memo = memo || { }; if (document.createEvent) { element.dispatchEvent(event); } else { element.fireEvent(event.eventType, event); } return event; } }; })()); Object.extend(Event, Event.Methods); Element.addMethods({ fire: Event.fire, observe: Event.observe, stopObserving: Event.stopObserving }); Object.extend(document, { fire: Element.Methods.fire.methodize(), observe: Element.Methods.observe.methodize(), stopObserving: Element.Methods.stopObserving.methodize() }); (function() { /* Support for the DOMContentLoaded event is based on work by Dan Webb, Matthias Miller, Dean Edwards and John Resig. */ var timer, fired = false; function fireContentLoadedEvent() { if (fired) return; if (timer) window.clearInterval(timer); document.fire("dom:loaded"); fired = true; } if (document.addEventListener) { if (Prototype.Browser.WebKit) { timer = window.setInterval(function() { if (/loaded|complete/.test(document.readyState)) fireContentLoadedEvent(); }, 0); Event.observe(window, "load", fireContentLoadedEvent); } else { document.addEventListener("DOMContentLoaded", fireContentLoadedEvent, false); } } else { document.write("