密码安全度提示（2）

技术2022-06-22 37

prototype.js文件，该文件注册了一些原型方法，应该是他从什么地方找来的吧

/* Prototype JavaScript framework, version 1.4.0 * (c) 2005 Sam Stephenson <sam@conio.net> * * Prototype is freely distributable under the terms of an MIT-style license. * For details, see the Prototype web site: http://prototype.conio.net/ */*--------------------------------------------------------------------------*/

var Prototype = { Version: '1.4.0', ScriptFragment: '(?:<script.*?>)((/n|/r|.)*?)(?:<//script>)',

emptyFunction: function() {}, K: function(x) {return x}}

var Class = { create: function() { return function() { this.initialize.apply(this, arguments); } }}

var Abstract = new Object();

Object.extend = function(destination, source) { for (property in source) { destination[property] = source[property]; } return destination;}

Object.inspect = function(object) { try { if (object == undefined) return 'undefined'; if (object == null) return 'null'; return object.inspect ? object.inspect() : object.toString(); } catch (e) { if (e instanceof RangeError) return '...'; throw e; }}

Function.prototype.bind = function() { var __method = this, args = $A(arguments), object = args.shift(); return function() { return __method.apply(object, args.concat($A(arguments))); }}

Function.prototype.bindAsEventListener = function(object) { var __method = this; return function(event) { return __method.call(object, event || window.event); }}

Object.extend(Number.prototype, { toColorPart: function() { var digits = this.toString(16); if (this < 16) return '0' + digits; return digits; },

succ: function() { return this + 1; },

times: function(iterator) { $R(0, this, true).each(iterator); return this; }});

var Try = { these: function() { var returnValue;

for (var i = 0; i < arguments.length; i++) { var lambda = arguments[i]; try { returnValue = lambda(); break; } catch (e) {} }

return returnValue; }}

/*--------------------------------------------------------------------------*/

var PeriodicalExecuter = Class.create();PeriodicalExecuter.prototype = { initialize: function(callback, frequency) { this.callback = callback; this.frequency = frequency; this.currentlyExecuting = false;

this.registerCallback(); },

registerCallback: function() { setInterval(this.onTimerEvent.bind(this), this.frequency * 1000); },

onTimerEvent: function() { if (!this.currentlyExecuting) { try { this.currentlyExecuting = true; this.callback(); } finally { this.currentlyExecuting = false; } } }}

/*--------------------------------------------------------------------------*/

function $() { var elements = new Array();

for (var i = 0; i < arguments.length; i++) { var element = arguments[i]; if (typeof element == 'string') element = document.getElementById(element);

if (arguments.length == 1) return element;

elements.push(element); }

return elements;}Object.extend(String.prototype, { 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(eval); },

escapeHTML: function() { var div = document.createElement('div'); var text = document.createTextNode(this); div.appendChild(text); return div.innerHTML; },

unescapeHTML: function() { var div = document.createElement('div'); div.innerHTML = this.stripTags(); return div.childNodes[0] ? div.childNodes[0].nodeValue : ''; },

toQueryParams: function() { var pairs = this.match(/^/??(.*)$/)[1].split('&'); return pairs.inject({}, function(params, pairString) { var pair = pairString.split('='); params[pair[0]] = pair[1]; return params; }); },

toArray: function() { return this.split(''); },

camelize: function() { var oStringList = this.split('-'); if (oStringList.length == 1) return oStringList[0];

var camelizedString = this.indexOf('-') == 0 ? oStringList[0].charAt(0).toUpperCase() + oStringList[0].substring(1) : oStringList[0];

for (var i = 1, len = oStringList.length; i < len; i++) { var s = oStringList[i]; camelizedString += s.charAt(0).toUpperCase() + s.substring(1); }

return camelizedString; },

inspect: function() { return "'" + this.replace('//', '').replace("'", '///'') + "'"; }});

String.prototype.parseQuery = String.prototype.toQueryParams;

var $break = new Object();var $continue = new Object();

all: function(iterator) { var result = true; this.each(function(value, index) { result = result && !!(iterator || Prototype.K)(value, index); if (!result) throw $break; }); return result; },

any: function(iterator) { var result = true; this.each(function(value, index) { if (result = !!(iterator || Prototype.K)(value, index)) throw $break; }); return result; },

collect: function(iterator) { var results = []; this.each(function(value, index) { results.push(iterator(value, index)); }); return results; },

detect: function (iterator) { var result; this.each(function(value, index) { if (iterator(value, index)) { result = value; throw $break; } }); return result; },

findAll: function(iterator) { var results = []; this.each(function(value, index) { if (iterator(value, index)) results.push(value); }); return results; },

grep: function(pattern, iterator) { var results = []; this.each(function(value, index) { var stringValue = value.toString(); if (stringValue.match(pattern)) results.push((iterator || Prototype.K)(value, index)); }) return results; },

include: function(object) { var found = false; this.each(function(value) { if (value == object) { found = true; throw $break; } }); return found; },

inject: function(memo, iterator) { this.each(function(value, index) { memo = iterator(memo, value, index); }); return memo; },

invoke: function(method) { var args = $A(arguments).slice(1); return this.collect(function(value) { return value[method].apply(value, args); }); },

max: function(iterator) { var result; this.each(function(value, index) { value = (iterator || Prototype.K)(value, index); if (value >= (result || value)) result = value; }); return result; },

min: function(iterator) { var result; this.each(function(value, index) { value = (iterator || Prototype.K)(value, index); if (value <= (result || value)) result = value; }); return result; },

partition: function(iterator) { var trues = [], falses = []; this.each(function(value, index) { ((iterator || Prototype.K)(value, index) ? trues : falses).push(value); }); return [trues, falses]; },

pluck: function(property) { var results = []; this.each(function(value, index) { results.push(value[property]); }); return results; },

reject: function(iterator) { var results = []; this.each(function(value, index) { if (!iterator(value, index)) results.push(value); }); return results; },

sortBy: function(iterator) { return this.collect(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.collect(Prototype.K); },

zip: function() { var iterator = Prototype.K, args = $A(arguments); if (typeof args.last() == 'function') iterator = args.pop();

var collections = [this].concat(args).map($A); return this.map(function(value, index) { iterator(value = collections.pluck(index)); return value; }); },

inspect: function() { return '#<Enumerable:' + this.toArray().inspect() + '>'; }}

Object.extend(Enumerable, { map: Enumerable.collect, find: Enumerable.detect, select: Enumerable.findAll, member: Enumerable.include, entries: Enumerable.toArray});var $A = Array.from = function(iterable) { if (!iterable) return []; if (iterable.toArray) { return iterable.toArray(); } else { var results = []; for (var i = 0; i < iterable.length; i++) results.push(iterable[i]); return results; }}

Object.extend(Array.prototype, Enumerable);

Array.prototype._reverse = Array.prototype.reverse;

Object.extend(Array.prototype, { _each: function(iterator) { for (var i = 0; i < this.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 != undefined || value != null; }); },

flatten: function() { return this.inject([], function(array, value) { return array.concat(value.constructor == Array ? value.flatten() : [value]); }); },

without: function() { var values = $A(arguments); return this.select(function(value) { return !values.include(value); }); },

indexOf: function(object) { for (var i = 0; i < this.length; i++) if (this[i] == object) return i; return -1; },

reverse: function(inline) { return (inline !== false ? this : this.toArray())._reverse(); },

shift: function() { var result = this[0]; for (var i = 0; i < this.length - 1; i++) this[i] = this[i + 1]; this.length--; return result; },

inspect: function() { return '[' + this.map(Object.inspect).join(', ') + ']'; }});var Hash = { _each: function(iterator) { for (key in this) { var value = this[key]; if (typeof value == 'function') continue;

var pair = [key, value]; pair.key = key; pair.value = value; iterator(pair); } },

keys: function() { return this.pluck('key'); },

values: function() { return this.pluck('value'); },

merge: function(hash) { return $H(hash).inject($H(this), function(mergedHash, pair) { mergedHash[pair.key] = pair.value; return mergedHash; }); },

toQueryString: function() { return this.map(function(pair) { return pair.map(encodeURIComponent).join('='); }).join('&'); },

inspect: function() { return '#<Hash:{' + this.map(function(pair) { return pair.map(Object.inspect).join(': '); }).join(', ') + '}>'; }}

_each: function(iterator) { var value = this.start; do { iterator(value); value = value.succ(); } while (this.include(value)); },

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 ActiveXObject('Msxml2.XMLHTTP')}, function() {return new ActiveXObject('Microsoft.XMLHTTP')}, function() {return new XMLHttpRequest()} ) || false; },

activeRequestCount: 0}

Ajax.Responders = { responders: [],

_each: function(iterator) { this.responders._each(iterator); },

unregister: function(responderToRemove) { this.responders = this.responders.without(responderToRemove); },

dispatch: function(callback, request, transport, json) { this.each(function(responder) { if (responder[callback] && typeof responder[callback] == 'function') { try { responder[callback].apply(responder, [request, transport, json]); } catch (e) {} } }); }};

Object.extend(Ajax.Responders, Enumerable);

Ajax.Responders.register({ onCreate: function() { Ajax.activeRequestCount++; },

onComplete: function() { Ajax.activeRequestCount--; }});

Ajax.Base = function() {};Ajax.Base.prototype = { setOptions: function(options) { this.options = { method: 'post', asynchronous: true, parameters: '' } Object.extend(this.options, options || {}); },

responseIsSuccess: function() { return this.transport.status == undefined || this.transport.status == 0 || (this.transport.status >= 200 && this.transport.status < 300); },

responseIsFailure: function() { return !this.responseIsSuccess(); }}

Ajax.Request = Class.create();Ajax.Request.Events = ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];

Ajax.Request.prototype = Object.extend(new Ajax.Base(), { initialize: function(url, options) { this.transport = Ajax.getTransport(); this.setOptions(options); this.request(url); },

request: function(url) { var parameters = this.options.parameters || ''; if (parameters.length > 0) parameters += '&_=';

try { this.url = url; if (this.options.method == 'get' && parameters.length > 0) this.url += (this.url.match(//?/) ? '&' : '?') + parameters;

Ajax.Responders.dispatch('onCreate', this, this.transport);

this.transport.open(this.options.method, this.url, this.options.asynchronous);

if (this.options.asynchronous) { this.transport.onreadystatechange = this.onStateChange.bind(this); setTimeout((function() {this.respondToReadyState(1)}).bind(this), 10); }

this.setRequestHeaders();

var body = this.options.postBody ? this.options.postBody : parameters; this.transport.send(this.options.method == 'post' ? body : null);

} catch (e) { this.dispatchException(e); } },

setRequestHeaders: function() { var requestHeaders = ['X-Requested-With', 'XMLHttpRequest', 'X-Prototype-Version', Prototype.Version];

if (this.options.method == 'post') { requestHeaders.push('Content-type', 'application/x-www-form-urlencoded');

/* Force "Connection: close" for Mozilla browsers to work around * a bug where XMLHttpReqeuest sends an incorrect Content-length * header. See Mozilla Bugzilla #246651. */ if (this.transport.overrideMimeType) requestHeaders.push('Connection', 'close'); }

if (this.options.requestHeaders) requestHeaders.push.apply(requestHeaders, this.options.requestHeaders);

for (var i = 0; i < requestHeaders.length; i += 2) this.transport.setRequestHeader(requestHeaders[i], requestHeaders[i+1]); },

onStateChange: function() { var readyState = this.transport.readyState; if (readyState != 1) this.respondToReadyState(this.transport.readyState); },

header: function(name) { try { return this.transport.getResponseHeader(name); } catch (e) {} },

evalJSON: function() { try { return eval(this.header('X-JSON')); } catch (e) {} },

evalResponse: function() { try { return eval(this.transport.responseText); } catch (e) { this.dispatchException(e); } },

respondToReadyState: function(readyState) { var event = Ajax.Request.Events[readyState]; var transport = this.transport, json = this.evalJSON();

if (event == 'Complete') { try { (this.options['on' + this.transport.status] || this.options['on' + (this.responseIsSuccess() ? 'Success' : 'Failure')] || Prototype.emptyFunction)(transport, json); } catch (e) { this.dispatchException(e); }

if ((this.header('Content-type') || '').match(/^text//javascript/i)) this.evalResponse(); }

try { (this.options['on' + event] || Prototype.emptyFunction)(transport, json); Ajax.Responders.dispatch('on' + event, this, transport, json); } catch (e) { this.dispatchException(e); }

/* Avoid memory leak in MSIE: clean up the oncomplete event handler */ if (event == 'Complete') this.transport.onreadystatechange = Prototype.emptyFunction; },

dispatchException: function(exception) { (this.options.onException || Prototype.emptyFunction)(this, exception); Ajax.Responders.dispatch('onException', this, exception); }});

Ajax.Updater = Class.create();

Object.extend(Object.extend(Ajax.Updater.prototype, Ajax.Request.prototype), { initialize: function(container, url, options) { this.containers = { success: container.success ? $(container.success) : $(container), failure: container.failure ? $(container.failure) : (container.success ? null : $(container)) }

this.transport = Ajax.getTransport(); this.setOptions(options);

var onComplete = this.options.onComplete || Prototype.emptyFunction; this.options.onComplete = (function(transport, object) { this.updateContent(); onComplete(transport, object); }).bind(this);

this.request(url); },

updateContent: function() { var receiver = this.responseIsSuccess() ? this.containers.success : this.containers.failure; var response = this.transport.responseText;

if (!this.options.evalScripts) response = response.stripScripts();

if (receiver) { if (this.options.insertion) { new this.options.insertion(receiver, response); } else { Element.update(receiver, response); } }

if (this.responseIsSuccess()) { if (this.onComplete) setTimeout(this.onComplete.bind(this), 10); } }});

Ajax.PeriodicalUpdater = Class.create();Ajax.PeriodicalUpdater.prototype = Object.extend(new Ajax.Base(), { initialize: function(container, url, options) { this.setOptions(options); this.onComplete = this.options.onComplete;

this.frequency = (this.options.frequency || 2); this.decay = (this.options.decay || 1);

this.updater = {}; this.container = container; this.url = url;

this.start(); },

start: function() { this.options.onComplete = this.updateComplete.bind(this); this.onTimerEvent(); },

stop: function() { this.updater.onComplete = undefined; clearTimeout(this.timer); (this.onComplete || Prototype.emptyFunction).apply(this, arguments); },

updateComplete: function(request) { if (this.options.decay) { this.decay = (request.responseText == this.lastText ? this.decay * this.options.decay : 1);

this.lastText = request.responseText; } this.timer = setTimeout(this.onTimerEvent.bind(this), this.decay * this.frequency * 1000); },

onTimerEvent: function() { this.updater = new Ajax.Updater(this.container, this.url, this.options); }});document.getElementsByClassName = function(className, parentElement) { var children = ($(parentElement) || document.body).getElementsByTagName('*'); return $A(children).inject([], function(elements, child) { if (child.className.match(new RegExp("(^|//s)" + className + "(//s|$)"))) elements.push(child); return elements; });}

/*--------------------------------------------------------------------------*/

if (!window.Element) { var Element = new Object();}

Object.extend(Element, { visible: function(element) { return $(element).style.display != 'none'; },

toggle: function() { for (var i = 0; i < arguments.length; i++) { var element = $(arguments[i]); Element[Element.visible(element) ? 'hide' : 'show'](element); } },

hide: function() { for (var i = 0; i < arguments.length; i++) { var element = $(arguments[i]); element.style.display = 'none'; } },

show: function() { for (var i = 0; i < arguments.length; i++) { var element = $(arguments[i]); element.style.display = ''; } },

remove: function(element) { element = $(element); element.parentNode.removeChild(element); },

update: function(element, html) { $(element).innerHTML = html.stripScripts(); setTimeout(function() {html.evalScripts()}, 10); },

getHeight: function(element) { element = $(element); return element.offsetHeight; },

classNames: function(element) { return new Element.ClassNames(element); },

hasClassName: function(element, className) { if (!(element = $(element))) return; return Element.classNames(element).include(className); },

addClassName: function(element, className) { if (!(element = $(element))) return; return Element.classNames(element).add(className); },

removeClassName: function(element, className) { if (!(element = $(element))) return; return Element.classNames(element).remove(className); },

// removes whitespace-only text node children cleanWhitespace: function(element) { element = $(element); for (var i = 0; i < element.childNodes.length; i++) { var node = element.childNodes[i]; if (node.nodeType == 3 && !//S/.test(node.nodeValue)) Element.remove(node); } },

empty: function(element) { return $(element).innerHTML.match(/^/s*$/); },

scrollTo: function(element) { element = $(element); var x = element.x ? element.x : element.offsetLeft, y = element.y ? element.y : element.offsetTop; window.scrollTo(x, y); },

getStyle: function(element, style) { element = $(element); var value = element.style[style.camelize()]; if (!value) { if (document.defaultView && document.defaultView.getComputedStyle) { var css = document.defaultView.getComputedStyle(element, null); value = css ? css.getPropertyValue(style) : null; } else if (element.currentStyle) { value = element.currentStyle[style.camelize()]; } }

if (window.opera && ['left', 'top', 'right', 'bottom'].include(style)) if (Element.getStyle(element, 'position') == 'static') value = 'auto';

return value == 'auto' ? null : value; },

setStyle: function(element, style) { element = $(element); for (name in style) element.style[name.camelize()] = style[name]; },

getDimensions: function(element) { element = $(element); if (Element.getStyle(element, 'display') != 'none') 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; els.visibility = 'hidden'; els.position = 'absolute'; els.display = ''; var originalWidth = element.clientWidth; var originalHeight = element.clientHeight; els.display = 'none'; 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; } } },

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 = ''; } },

makeClipping: function(element) { element = $(element); if (element._overflow) return; element._overflow = element.style.overflow; if ((Element.getStyle(element, 'overflow') || 'visible') != 'hidden') element.style.overflow = 'hidden'; },

undoClipping: function(element) { element = $(element); if (element._overflow) return; element.style.overflow = element._overflow; element._overflow = undefined; }});

var Toggle = new Object();Toggle.display = Element.toggle;

/*--------------------------------------------------------------------------*/

Abstract.Insertion = function(adjacency) { this.adjacency = adjacency;}

Abstract.Insertion.prototype = { initialize: function(element, content) { this.element = $(element); this.content = content.stripScripts();

if (this.adjacency && this.element.insertAdjacentHTML) { try { this.element.insertAdjacentHTML(this.adjacency, this.content); } catch (e) { if (this.element.tagName.toLowerCase() == 'tbody') { this.insertContent(this.contentFromAnonymousTable()); } else { throw e; } } } else { this.range = this.element.ownerDocument.createRange(); if (this.initializeRange) this.initializeRange(); this.insertContent([this.range.createContextualFragment(this.content)]); }

setTimeout(function() {content.evalScripts()}, 10); },

contentFromAnonymousTable: function() { var div = document.createElement('div'); div.innerHTML = '<table><tbody>' + this.content + '</tbody></table>'; return $A(div.childNodes[0].childNodes[0].childNodes); }}

var Insertion = new Object();

Insertion.Before = Class.create();Insertion.Before.prototype = Object.extend(new Abstract.Insertion('beforeBegin'), { initializeRange: function() { this.range.setStartBefore(this.element); },

insertContent: function(fragments) { fragments.each((function(fragment) { this.element.parentNode.insertBefore(fragment, this.element); }).bind(this)); }});

Insertion.Top = Class.create();Insertion.Top.prototype = Object.extend(new Abstract.Insertion('afterBegin'), { initializeRange: function() { this.range.selectNodeContents(this.element); this.range.collapse(true); },

insertContent: function(fragments) { fragments.reverse(false).each((function(fragment) { this.element.insertBefore(fragment, this.element.firstChild); }).bind(this)); }});

Insertion.Bottom = Class.create();Insertion.Bottom.prototype = Object.extend(new Abstract.Insertion('beforeEnd'), { initializeRange: function() { this.range.selectNodeContents(this.element); this.range.collapse(this.element); },

insertContent: function(fragments) { fragments.each((function(fragment) { this.element.appendChild(fragment); }).bind(this)); }});

Insertion.After = Class.create();Insertion.After.prototype = Object.extend(new Abstract.Insertion('afterEnd'), { initializeRange: function() { this.range.setStartAfter(this.element); },

insertContent: function(fragments) { fragments.each((function(fragment) { this.element.parentNode.insertBefore(fragment, this.element.nextSibling); }).bind(this)); }});

/*--------------------------------------------------------------------------*/

Element.ClassNames = Class.create();Element.ClassNames.prototype = { initialize: function(element) { this.element = $(element); },

_each: function(iterator) { this.element.className.split(//s+/).select(function(name) { return name.length > 0; })._each(iterator); },

set: function(className) { this.element.className = className; },

add: function(classNameToAdd) { if (this.include(classNameToAdd)) return; this.set(this.toArray().concat(classNameToAdd).join(' ')); },

remove: function(classNameToRemove) { if (!this.include(classNameToRemove)) return; this.set(this.select(function(className) { return className != classNameToRemove; }).join(' ')); },

toString: function() { return this.toArray().join(' '); }}

Object.extend(Element.ClassNames.prototype, Enumerable);var Field = { clear: function() { for (var i = 0; i < arguments.length; i++) $(arguments[i]).value = ''; },

focus: function(element) { $(element).focus(); },

present: function() { for (var i = 0; i < arguments.length; i++) if ($(arguments[i]).value == '') return false; return true; },

select: function(element) { $(element).select(); },

activate: function(element) { element = $(element); element.focus(); if (element.select) element.select(); }}

/*--------------------------------------------------------------------------*/

var Form = { serialize: function(form) { var elements = Form.getElements($(form)); var queryComponents = new Array();

for (var i = 0; i < elements.length; i++) { var queryComponent = Form.Element.serialize(elements[i]); if (queryComponent) queryComponents.push(queryComponent); }

return queryComponents.join('&'); },

getElements: function(form) { form = $(form); var elements = new Array();

for (tagName in Form.Element.Serializers) { var tagElements = form.getElementsByTagName(tagName); for (var j = 0; j < tagElements.length; j++) elements.push(tagElements[j]); } return elements; },

getInputs: function(form, typeName, name) { form = $(form); var inputs = form.getElementsByTagName('input');

if (!typeName && !name) return inputs;

var matchingInputs = new Array(); for (var i = 0; i < inputs.length; i++) { var input = inputs[i]; if ((typeName && input.type != typeName) || (name && input.name != name)) continue; matchingInputs.push(input); }

return matchingInputs; },

disable: function(form) { var elements = Form.getElements(form); for (var i = 0; i < elements.length; i++) { var element = elements[i]; element.blur(); element.disabled = 'true'; } },

enable: function(form) { var elements = Form.getElements(form); for (var i = 0; i < elements.length; i++) { var element = elements[i]; element.disabled = ''; } },

findFirstElement: function(form) { return Form.getElements(form).find(function(element) { return element.type != 'hidden' && !element.disabled && ['input', 'select', 'textarea'].include(element.tagName.toLowerCase()); }); },

focusFirstElement: function(form) { Field.activate(Form.findFirstElement(form)); },

reset: function(form) { $(form).reset(); }}

Form.Element = { serialize: function(element) { element = $(element); var method = element.tagName.toLowerCase(); var parameter = Form.Element.Serializers[method](element);

if (parameter) { var key = encodeURIComponent(parameter[0]); if (key.length == 0) return;

if (parameter[1].constructor != Array) parameter[1] = [parameter[1]];

return parameter[1].map(function(value) { return key + '=' + encodeURIComponent(value); }).join('&'); } },

getValue: function(element) { element = $(element); var method = element.tagName.toLowerCase(); var parameter = Form.Element.Serializers[method](element);

if (parameter) return parameter[1]; }}

Form.Element.Serializers = { input: function(element) { switch (element.type.toLowerCase()) { case 'submit': case 'hidden': case 'password': case 'text': return Form.Element.Serializers.textarea(element); case 'checkbox': case 'radio': return Form.Element.Serializers.inputSelector(element); } return false; },

inputSelector: function(element) { if (element.checked) return [element.name, element.value]; },

textarea: function(element) { return [element.name, element.value]; },

select: function(element) { return Form.Element.Serializers[element.type == 'select-one' ? 'selectOne' : 'selectMany'](element); },

selectOne: function(element) { var value = '', opt, index = element.selectedIndex; if (index >= 0) { opt = element.options[index]; value = opt.value; if (!value && !('value' in opt)) value = opt.text; } return [element.name, value]; },

selectMany: function(element) { var value = new Array(); for (var i = 0; i < element.length; i++) { var opt = element.options[i]; if (opt.selected) { var optValue = opt.value; if (!optValue && !('value' in opt)) optValue = opt.text; value.push(optValue); } } return [element.name, value]; }}

/*--------------------------------------------------------------------------*/

var $F = Form.Element.getValue;

/*--------------------------------------------------------------------------*/

Abstract.TimedObserver = function() {}Abstract.TimedObserver.prototype = { initialize: function(element, frequency, callback) { this.frequency = frequency; this.element = $(element); this.callback = callback;

this.lastValue = this.getValue(); this.registerCallback(); },

registerCallback: function() { setInterval(this.onTimerEvent.bind(this), this.frequency * 1000); },

onTimerEvent: function() { var value = this.getValue(); if (this.lastValue != value) { this.callback(this.element, value); this.lastValue = value; } }}

Form.Element.Observer = Class.create();Form.Element.Observer.prototype = Object.extend(new Abstract.TimedObserver(), { getValue: function() { return Form.Element.getValue(this.element); }});

Form.Observer = Class.create();Form.Observer.prototype = Object.extend(new Abstract.TimedObserver(), { getValue: function() { return Form.serialize(this.element); }});

/*--------------------------------------------------------------------------*/

Abstract.EventObserver = function() {}Abstract.EventObserver.prototype = { 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() { var elements = Form.getElements(this.element); for (var i = 0; i < elements.length; i++) this.registerCallback(elements[i]); },

registerCallback: function(element) { if (element.type) { switch (element.type.toLowerCase()) { case 'checkbox': case 'radio': Event.observe(element, 'click', this.onElementEvent.bind(this)); break; case 'password': case 'text': case 'textarea': case 'select-one': case 'select-multiple': Event.observe(element, 'change', this.onElementEvent.bind(this)); break; } } }}

Form.Element.EventObserver = Class.create();Form.Element.EventObserver.prototype = Object.extend(new Abstract.EventObserver(), { getValue: function() { return Form.Element.getValue(this.element); }});

Form.EventObserver = Class.create();Form.EventObserver.prototype = Object.extend(new Abstract.EventObserver(), { getValue: function() { return Form.serialize(this.element); }});if (!window.Event) { var Event = new Object();}

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,

element: function(event) { return event.target || event.srcElement; },

isLeftClick: function(event) { return (((event.which) && (event.which == 1)) || ((event.button) && (event.button == 1))); },

pointerX: function(event) { return event.pageX || (event.clientX + (document.documentElement.scrollLeft || document.body.scrollLeft)); },

pointerY: function(event) { return event.pageY || (event.clientY + (document.documentElement.scrollTop || document.body.scrollTop)); },

stop: function(event) { if (event.preventDefault) { event.preventDefault(); event.stopPropagation(); } else { event.returnValue = false; event.cancelBubble = true; } },

// find the first node with the given tagName, starting from the // node the event was triggered on; traverses the DOM upwards findElement: function(event, tagName) { var element = Event.element(event); while (element.parentNode && (!element.tagName || (element.tagName.toUpperCase() != tagName.toUpperCase()))) element = element.parentNode; return element; },

observers: false,

_observeAndCache: function(element, name, observer, useCapture) { if (!this.observers) this.observers = []; if (element.addEventListener) { this.observers.push([element, name, observer, useCapture]); element.addEventListener(name, observer, useCapture); } else if (element.attachEvent) { this.observers.push([element, name, observer, useCapture]); element.attachEvent('on' + name, observer); } },

unloadCache: function() { if (!Event.observers) return; for (var i = 0; i < Event.observers.length; i++) { Event.stopObserving.apply(this, Event.observers[i]); Event.observers[i][0] = null; } Event.observers = false; },

observe: function(element, name, observer, useCapture) { var element = $(element); useCapture = useCapture || false;

if (name == 'keypress' && (navigator.appVersion.match(/Konqueror|Safari|KHTML/) || element.attachEvent)) name = 'keydown';

this._observeAndCache(element, name, observer, useCapture); },

stopObserving: function(element, name, observer, useCapture) { var element = $(element); useCapture = useCapture || false;

if (name == 'keypress' && (navigator.appVersion.match(/Konqueror|Safari|KHTML/) || element.detachEvent)) name = 'keydown';

if (element.removeEventListener) { element.removeEventListener(name, observer, useCapture); } else if (element.detachEvent) { element.detachEvent('on' + name, observer); } }});

/* prevent memory leaks in IE */Event.observe(window, 'unload', Event.unloadCache, false);var Position = { // set to true if needed, warning: firefox performance problems // NOT neeeded for page scrolling, only if draggable contained in // scrollable elements includeScrollOffsets: false,

// must be called before calling withinIncludingScrolloffset, every time the // page is scrolled prepare: function() { this.deltaX = window.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft || 0; this.deltaY = window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop || 0; },

realOffset: function(element) { var valueT = 0, valueL = 0; do { valueT += element.scrollTop || 0; valueL += element.scrollLeft || 0; element = element.parentNode; } while (element); return [valueL, valueT]; },

cumulativeOffset: function(element) { var valueT = 0, valueL = 0; do { valueT += element.offsetTop || 0; valueL += element.offsetLeft || 0; element = element.offsetParent; } while (element); return [valueL, valueT]; },

positionedOffset: function(element) { var valueT = 0, valueL = 0; do { valueT += element.offsetTop || 0; valueL += element.offsetLeft || 0; element = element.offsetParent; if (element) { p = Element.getStyle(element, 'position'); if (p == 'relative' || p == 'absolute') break; } } while (element); return [valueL, valueT]; },

offsetParent: 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; },

// caches x/y coordinate pair to use with overlap within: function(element, x, y) { if (this.includeScrollOffsets) return this.withinIncludingScrolloffsets(element, x, y); this.xcomp = x; this.ycomp = y; this.offset = this.cumulativeOffset(element);

return (y >= this.offset[1] && y < this.offset[1] + element.offsetHeight && x >= this.offset[0] && x < this.offset[0] + element.offsetWidth); },

withinIncludingScrolloffsets: function(element, x, y) { var offsetcache = this.realOffset(element);

this.xcomp = x + offsetcache[0] - this.deltaX; this.ycomp = y + offsetcache[1] - this.deltaY; this.offset = this.cumulativeOffset(element);

return (this.ycomp >= this.offset[1] && this.ycomp < this.offset[1] + element.offsetHeight && this.xcomp >= this.offset[0] && this.xcomp < this.offset[0] + element.offsetWidth); },

// within must be called directly before overlap: function(mode, element) { if (!mode) return 0; if (mode == 'vertical') return ((this.offset[1] + element.offsetHeight) - this.ycomp) / element.offsetHeight; if (mode == 'horizontal') return ((this.offset[0] + element.offsetWidth) - this.xcomp) / element.offsetWidth; },

clone: function(source, target) { source = $(source); target = $(target); target.style.position = 'absolute'; var offsets = this.cumulativeOffset(source); target.style.top = offsets[1] + 'px'; target.style.left = offsets[0] + 'px'; target.style.width = source.offsetWidth + 'px'; target.style.height = source.offsetHeight + 'px'; },

page: 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) if (Element.getStyle(element,'position')=='absolute') break;

} while (element = element.offsetParent);

element = forElement; do { valueT -= element.scrollTop || 0; valueL -= element.scrollLeft || 0; } while (element = element.parentNode);

return [valueL, valueT]; },

clone: function(source, target) { 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 = Position.page(source);

// find coordinate system to use target = $(target); 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(target,'position') == 'absolute') { parent = Position.offsetParent(target); delta = Position.page(parent); }

// 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) target.style.left = (p[0] - delta[0] + options.offsetLeft) + 'px'; if(options.setTop) target.style.top = (p[1] - delta[1] + options.offsetTop) + 'px'; if(options.setWidth) target.style.width = source.offsetWidth + 'px'; if(options.setHeight) target.style.height = source.offsetHeight + 'px'; },

absolutize: function(element) { element = $(element); if (element.style.position == 'absolute') return; Position.prepare();

var offsets = Position.positionedOffset(element); var top = offsets[1]; var left = offsets[0]; var width = element.clientWidth; var height = element.clientHeight;

element._originalLeft = left - parseFloat(element.style.left || 0); element._originalTop = top - parseFloat(element.style.top || 0); element._originalWidth = element.style.width; element._originalHeight = element.style.height;

element.style.position = 'absolute'; element.style.top = top + 'px';; element.style.left = left + 'px';; element.style.width = width + 'px';; element.style.height = height + 'px';; },

relativize: function(element) { element = $(element); if (element.style.position == 'relative') return; Position.prepare();

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; }}

// Safari returns margins on body which is incorrect if the child is absolutely// positioned. For performance reasons, redefine Position.cumulativeOffset for// KHTML/WebKit only.if (/Konqueror|Safari|KHTML/.test(navigator.userAgent)) { Position.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 [valueL, valueT]; }}

reg.htm，测试页面，可以参考里面的JS调用，来嵌入到自己的页面里

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd"><html><head><title>用户注册页面</title><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><script language="javascript" src="js/common.js"></script><script language="javascript" src="js/prototype.js"></script><script language="javascript" src="js/passwordstrength.js"></script><script language="javascript" src="reg.js"></script>

<body onLoad="initPage();"><form id=Reg name=Reg action=RegSave.asp><table width="52%" border="0" align="center" cellpadding="5" cellspacing="1" bgcolor="#CCCCCC"> <tr> <th width="20%" bgcolor="#EEEEEE" scope="row">用户名</th> <td bgcolor="#FFFFFF"><div class="FrameDivNormal" id="usrFrameDiv"><input name="usrInput" type="text" id="usrInput" maxlength="16" onKeyUp="checkUsr(this.value);changeUsr();" onFocus="checkUsr(this.value);"> <div id="usrInfoDiv"></div> </div></td> </tr> <tr> <th bgcolor="#EEEEEE" scope="row"> </th> <td bgcolor="#FFFFFF" ><input name="checkBtn" type="button" id="checkBtn" onClick="loadCheck();" value="检测用户名是否可用"> <div id="checkDiv"></div></td> </tr> <tr> <th bgcolor="#EEEEEE" scope="row">密码强度</th> <td bgcolor="#FFFFFF"> <script language="javascript"> var ps = new PasswordStrength(); ps.setSize("260","22"); </script> </td> </tr> <tr> <th bgcolor="#EEEEEE" scope="row">密码</th> <td bgcolor="#FFFFFF"><div class="FrameDivNormal" id="pwdFrameDiv"><input name="pwdInput" type="password" id="pwdInput" maxlength="16" onKeyUp="checkPwd(this.value);" onFocus="checkPwd(this.value);"> <div id="pwdInfoDiv"></div> </div></td> </tr> <tr> <th bgcolor="#EEEEEE" scope="row">确认密码</th> <td bgcolor="#FFFFFF"><div class="FrameDivNormal" id="repwdFrameDiv"><input name="repwdInput" type="password" id="repwdInput" maxlength="16" onKeyUp="checkPwd2(this.value);" onFocus="checkPwd2(this.value);"> <div id="repwdInfoDiv"></div> </div></td> </tr> <tr> <th bgcolor="#EEEEEE" scope="row">EMail</th> <td bgcolor="#FFFFFF"><div class="FrameDivNormal" id="emlFrameDiv"><input name="emlInput" type="text" id="emlInput" onFocus="checkEml(this.value);" onKeyUp="checkEml(this.value);" maxlength="40"> <div id="emlInfoDiv"></div> </div></td> </tr> <tr> <th bgcolor="#EEEEEE" scope="row">公司名称</th> <td bgcolor="#FFFFFF"><div class="FrameDivNormal" id="emlFrameDiv"><input name="cnInput" type="text" id="cnInput" maxlength="40"> <div id="emlInfoDiv"></div> </div></td> </tr> <tr> <th bgcolor="#EEEEEE" scope="row">公司简介</th> <td bgcolor="#FFFFFF"><div class="FrameDivNormal" id="emlFrameDiv"><input name="csInput" type="text" id="csInput" maxlength="40"> <div id="emlInfoDiv"></div> </div></td> </tr> <tr> <th bgcolor="#EEEEEE" scope="row">公司地址</th> <td bgcolor="#FFFFFF"><div class="FrameDivNormal" id="emlFrameDiv"><input name="caInput" type="text" id="caInput" maxlength="40"> <div id="emlInfoDiv"></div> </div></td> </tr> <tr> <th bgcolor="#EEEEEE" scope="row">联系电话</th> <td bgcolor="#FFFFFF"><div class="FrameDivNormal" id="emlFrameDiv"><input name="ctInput" type="text" id="ctInput" maxlength="40"> <div id="emlInfoDiv"></div> </div></td> </tr> <tr> <th bgcolor="#EEEEEE" scope="row"> </th> <td bgcolor="#FFFFFF"><div align="center"> <input type="submit" name="Submit" value="提交"> </div></td> </tr></table></form></body></html>

本文来自博客，转载请标明出处：http://blog.csdn.net/honkerhero/archive/2007/04/30/1592613.aspx

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