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最新评论
-
jiazhen1021:
...
Spring框架中的Bean对象的生命周期 -
zzjmates:
很浅显的东西,没有讲到本质
深度解析JSP工作原理 -
knightjames:
好文章,虽然只是看懂一部分
深度解析JSP工作原理 -
jarip:
好文章就是看一遍就能清楚个大概,
深度解析JSP工作原理 -
qq672076266:
good
pageContext对象
Validate.html <html> <head> <title>Validate me!</title> <script type="text/javascript" src="prototype.js"></script> <script type="text/javascript" src="FieldValidator.js"></script> <script type="text/javascript" src="HelpConveyer.js"></script> <script type="text/javascript"> window.onload = function() { new FieldValidator('nameField', FieldValidator.verifier.NotBlank); new FieldValidator('emailField', '/aip.chap10/command/VerifyEmail'); new FieldValidator('ageField', FieldValidator.verifier.IsNumeric); new HelpConveyer( 'helpDisplay', document.memberForm, '/aip.chap10/command/GetHelp', 'topic' ); document.memberForm.name.focus(); } </script> <link rel="stylesheet" type="text/css" href="styles.css"/> <style type="text/css"> body { font-size: 8pt; } #formControls { float: left; } #helpContainer { float: left; } #nameField, #emailField { width: 256px; } #ageField { width: 64px; } .fieldInError { background-color: #ffffcc; border-color: maroon; } #errorContainer { border: 3px outset maroon; background-color: #ffffcc; padding: 4px; color: maroon; font-weight: bold; margin-bottom: 12px; } </style> </head> <body> <fieldset style="width:600px;height:340px;padding-top:16px"> <legend>Become a member!</legend> <div id="formControls"> <form name="memberForm"> <div id="errorContainer" style="display:none"></div> <div class="line"> <label>Member name:</label> <input type="text" name="name" id="nameField"/> </div> <div class="line"> <label>E-mail address:</label> <input type="text" name="email" id="emailField"/> </div> <div class="line"> <label>Your age:</label> <input type="text" name="age" id="ageField"/> </div> <div align="center" id="buttonBar"> <input type="button" value="Join!" name="joinButton"/> <input type="button" value="Cancel" name="cancelButton"/> </div> <div id="console"></div> </form> </div> <div id="helpContainer"> <div id="helpSticky"> <div id="helpDisplay"> </div> </div> </div> </fieldset> </body> </html> prototype.js 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(); var Enumerable = { each: function(iterator) { var index = 0; try { this._each(function(value) { try { iterator(value, index++); } catch (e) { if (e != $continue) throw e; } }); } catch (e) { if (e != $break) throw e; } }, 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(', ') + '}>'; } } function $H(object) { var hash = Object.extend({}, object || {}); Object.extend(hash, Enumerable); Object.extend(hash, Hash); return hash; } ObjectRange = Class.create(); Object.extend(ObjectRange.prototype, Enumerable); Object.extend(ObjectRange.prototype, { initialize: function(start, end, exclusive) { this.start = start; this.end = end; this.exclusive = exclusive; }, _each: function(iterator) { var value = this.start; 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); }, register: function(responderToAdd) { if (!this.include(responderToAdd)) this.responders.push(responderToAdd); }, 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]; } } ieldValidator.js FieldValidator = Class.create(); FieldValidator.prototype = { initialize: function(field,verifier,options) { this.field = $(field); this.verifier = verifier; this.options = Object.extend( { errorContainer: 'errorContainer', errorClassName: 'fieldInError', paramName: 'value' }, options ); this.errorContainer = $(this.options.errorContainer); this.field.validator = this; this.field.onblur = function() { this.validator.validate(); } }, validate: function() { this.clearError(); if (this.verifier instanceof Function) { var message = this.verifier(this.field); if (message != null) this.markInError(message); } else { var validator = this; var paramHash = {}; paramHash[this.options.paramName] = $F(this.field); new Ajax.Request( this.verifier, { parameters: $H(paramHash).toQueryString(), method: 'get', onSuccess: function(transport) { if (transport.responseText != '') { validator.markInError(transport.responseText); } } } ); } }, markInError: function(message) { Element.addClassName(this.field, this.options.errorClassName); this.errorMessageElement = document.createElement('div'); this.errorMessageElement.appendChild( document.createTextNode(message) ); this.errorContainer.appendChild( this.errorMessageElement); Element.show(this.errorContainer); }, clearError: function() { Element.removeClassName(this.field, this.options.errorClassName); if (this.errorMessageElement) this.errorMessageElement.parentNode .removeChild(this.errorMessageElement); } } FieldValidator.verifier = {}; FieldValidator.verifier.NotBlank = function(field) { if ($F(field) == '') { return 'The ' + field.name + ' field cannot be blank'; } else { return null; } } FieldValidator.verifier.IsNumeric = function(field) { if ($F(field) == '' || isNaN(new Number($F(field)))) { return 'The ' + field.name + ' field must be numeric'; } else { return null; } } HelpConveyer.js HelpConveyer = Class.create(); HelpConveyer.prototype = { initialize: function(targetElement,form,url,paramName) { this.target = targetElement; this.form = form; this.url = url; this.paramName = paramName; var conveyer = this; $A(this.form.elements).each( function(control) { if (control.name != undefined && control.name != '') { control.onfocus = function() { var paramHash = {}; paramHash[conveyer.paramName] = control.name; new Ajax.Updater( conveyer.target, conveyer.url, { method: 'get', parameters: $H(paramHash).toQueryString() } ); }; } } ); } } style.css body { font-size: 11pt; } legend { border: 1px black solid; padding: 2px 4px; } .line { clear: both; padding-bottom: 8px; } .line label { font-weight: bold; width: 96px; float: left; } #buttonBar input { width: 64px; } #helpContainer { margin-left: 32px; } #helpSticky { background-color: #ffff99; background-image: url('helpfiles/pushpin.gif'); background-repeat: no-repeat; border: 1px solid #cccc66; } #helpDisplay { overflow: auto; width: 188px; height: 250px; padding: 4px; margin-top: 32px; }
发表评论
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JS..........
2009-12-04 03:22 14481.Jquery支持JSON 发送请求的方法 $ ... -
HTML
2009-12-04 03:20 1213<table> <tr> & ... -
DOM那点事儿。。
2009-12-02 00:35 1460DOM简介 DOM的接口和类 ... -
转载啊
2009-12-01 22:13 1285<!DOCTYPE html PUBLIC &qu ... -
JSP的7个动作指令
2009-11-30 17:10 2036JSP动作指令主要有如 ... -
JSP内置对象
2009-11-30 17:00 1938JSP脚本中包含9个内置对象,这9个内置对象都是Serv ... -
Exception对象
2009-11-30 16:38 1209Exception对象是Throwable的子类,代表着JSP ... -
pageContext对象
2009-11-30 16:19 10691使用pageContext可以访问page、reques ... -
Java图片切割
2009-11-30 16:03 4155protected void processReque ... -
JDBC即(JAVA_DATABASE_CONNECTION)一
2009-11-30 14:36 12792 - 连接 本概 ... -
Js实现图片切割
2009-11-30 01:21 2256//图片切割 var ImgCropper = Cla ... -
Js获取所有文本节点
2009-11-30 00:25 4423<script type="text/ ... -
ANT工具使用
2009-11-28 00:23 1601ant使用: 1.下载ant构建工具1.7.1 2. ... -
编程单词
2009-11-28 00:21 950+release #n.释放, 排放, 解除释放令公映 ... -
JavaEnum
2009-11-27 15:32 878public class WeekDay { ... -
JS中获取节点下元素
2009-11-26 23:01 2045<html> <head> ... -
JavaScript遍历数组
2009-11-22 17:37 1388function ForInDemo() { // 创 ... -
Javascript数组遍历
2009-11-22 17:32 1304function ForInDemo() { // 创 ... -
JavaScript的一个随即例子
2009-11-22 01:44 967<!DOCTYPE HTML PUBLIC " ... -
Swing小程序
2009-11-22 01:17 846import java.awt.*; import ...
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Ajax可以在此场景中发挥作用,通过在用户输入时或输入结束后立即发送校验请求,而不必等待用户提交表单。 **实现步骤:** 1. 创建一个HTML输入框,用于用户输入用户名。 2. 使用JavaScript(可能结合事件委托)监听...
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总结,本教程的“用户名校验(ajax技术)”主要涉及Ajax的基础使用,包括创建XMLHttpRequest对象、发送请求、处理响应等步骤。通过这个简单的示例,初学者可以了解到Ajax如何实现页面的异步更新,为后续更复杂的Web...
Ajax(Asynchronous JavaScript and XML)是一种创建动态网页的技术,它允许在不刷新整个页面的情况下与服务器交换数据并更新部分网页内容。在本示例中,我们主要关注以下几个关键知识点: 1. **jQuery库**:在...