jquey表单序列化
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jquery官方提供的表单序列化插件：
/*! * jQuery Form Plugin * version: 3.51.0-2014.06.20 * Requires jQuery v1.5 or later * Copyright (c) 2014 M. Alsup * Examples and documentation at: http://malsup.com/jquery/form/ * Project repository: https://github.com/malsup/form * Dual licensed under the MIT and GPL licenses. * https://github.com/malsup/form#copyright-and-license *//*global ActiveXObject */// AMD support(function (factory) { "use strict"; if (typeof define === 'function' && define.amd) { // using AMD; register as anon module define(['jquery'], factory); } else { // no AMD; invoke directly factory( (typeof(jQuery) != 'undefined') ? jQuery : window.Zepto ); }}(function($) {"use strict";/* Usage Note: ----------- Do not use both ajaxSubmit and ajaxForm on the same form. These functions are mutually exclusive. Use ajaxSubmit if you want to bind your own submit handler to the form. For example, $(document).ready(function() { $('#myForm').on('submit', function(e) { e.preventDefault(); // <-- important $(this).ajaxSubmit({ target: '#output' }); }); }); Use ajaxForm when you want the plugin to manage all the event binding for you. For example, $(document).ready(function() { $('#myForm').ajaxForm({ target: '#output' }); }); You can also use ajaxForm with delegation (requires jQuery v1.7+), so the form does not have to exist when you invoke ajaxForm: $('#myForm').ajaxForm({ delegation: true, target: '#output' }); When using ajaxForm, the ajaxSubmit function will be invoked for you at the appropriate time.*//** * Feature detection */var feature = {};feature.fileapi = $("<input type='file'/>").get(0).files !== undefined;feature.formdata = window.FormData !== undefined;var hasProp = !!$.fn.prop;// attr2 uses prop when it can but checks the return type for// an expected string. this accounts for the case where a form // contains inputs with names like "action" or "method"; in those// cases "prop" returns the element$.fn.attr2 = function() { if ( ! hasProp ) { return this.attr.apply(this, arguments); } var val = this.prop.apply(this, arguments); if ( ( val && val.jquery ) || typeof val === 'string' ) { return val; } return this.attr.apply(this, arguments);};/** * ajaxSubmit() provides a mechanism for immediately submitting * an HTML form using AJAX. */$.fn.ajaxSubmit = function(options) { /*jshint scripturl:true */ // fast fail if nothing selected (http://dev.jquery.com/ticket/2752) if (!this.length) { log('ajaxSubmit: skipping submit process - no element selected'); return this; } var method, action, url, $form = this; if (typeof options == 'function') { options = { success: options }; } else if ( options === undefined ) { options = {}; } method = options.type || this.attr2('method'); action = options.url || this.attr2('action'); url = (typeof action === 'string') ? $.trim(action) : ''; url = url || window.location.href || ''; if (url) { // clean url (don't include hash vaue) url = (url.match(/^([^#]+)/)||[])[1]; } options = $.extend(true, { url: url, success: $.ajaxSettings.success, type: method || $.ajaxSettings.type, iframeSrc: /^https/i.test(window.location.href || '') ? 'javascript:false' : 'about:blank' }, options); // hook for manipulating the form data before it is extracted; // convenient for use with rich editors like tinyMCE or FCKEditor var veto = {}; this.trigger('form-pre-serialize', [this, options, veto]); if (veto.veto) { log('ajaxSubmit: submit vetoed via form-pre-serialize trigger'); return this; } // provide opportunity to alter form data before it is serialized if (options.beforeSerialize && options.beforeSerialize(this, options) === false) { log('ajaxSubmit: submit aborted via beforeSerialize callback'); return this; } var traditional = options.traditional; if ( traditional === undefined ) { traditional = $.ajaxSettings.traditional; } var elements = []; var qx, a = this.formToArray(options.semantic, elements); if (options.data) { options.extraData = options.data; qx = $.param(options.data, traditional); } // give pre-submit callback an opportunity to abort the submit if (options.beforeSubmit && options.beforeSubmit(a, this, options) === false) { log('ajaxSubmit: submit aborted via beforeSubmit callback'); return this; } // fire vetoable 'validate' event this.trigger('form-submit-validate', [a, this, options, veto]); if (veto.veto) { log('ajaxSubmit: submit vetoed via form-submit-validate trigger'); return this; } var q = $.param(a, traditional); if (qx) { q = ( q ? (q + '&' + qx) : qx ); } if (options.type.toUpperCase() == 'GET') { options.url += (options.url.indexOf('?') >= 0 ? '&' : '?') + q; options.data = null; // data is null for 'get' } else { options.data = q; // data is the query string for 'post' } var callbacks = []; if (options.resetForm) { callbacks.push(function() { $form.resetForm(); }); } if (options.clearForm) { callbacks.push(function() { $form.clearForm(options.includeHidden); }); } // perform a load on the target only if dataType is not provided if (!options.dataType && options.target) { var oldSuccess = options.success || function(){}; callbacks.push(function(data) { var fn = options.replaceTarget ? 'replaceWith' : 'html'; $(options.target)[fn](data).each(oldSuccess, arguments); }); } else if (options.success) { callbacks.push(options.success); } options.success = function(data, status, xhr) { // jQuery 1.4+ passes xhr as 3rd arg var context = options.context || this ; // jQuery 1.4+ supports scope context for (var i=0, max=callbacks.length; i < max; i++) { callbacks[i].apply(context, [data, status, xhr || $form, $form]); } }; if (options.error) { var oldError = options.error; options.error = function(xhr, status, error) { var context = options.context || this; oldError.apply(context, [xhr, status, error, $form]); }; } if (options.complete) { var oldComplete = options.complete; options.complete = function(xhr, status) { var context = options.context || this; oldComplete.apply(context, [xhr, status, $form]); }; } // are there files to upload? // [value] (issue #113), also see comment: // https://github.com/malsup/form/commit/588306aedba1de01388032d5f42a60159eea9228#commitcomment-2180219 var fileInputs = $('input[type=file]:enabled', this).filter(function() { return $(this).val() !== ''; }); var hasFileInputs = fileInputs.length > 0; var mp = 'multipart/form-data'; var multipart = ($form.attr('enctype') == mp || $form.attr('encoding') == mp); var fileAPI = feature.fileapi && feature.formdata; log("fileAPI :" + fileAPI); var shouldUseFrame = (hasFileInputs || multipart) && !fileAPI; var jqxhr; // options.iframe allows user to force iframe mode // 06-NOV-09: now defaulting to iframe mode if file input is detected if (options.iframe !== false && (options.iframe || shouldUseFrame)) { // hack to fix Safari hang (thanks to Tim Molendijk for this) // see: http://groups.google.com/group/jquery-dev/browse_thread/thread/36395b7ab510dd5d if (options.closeKeepAlive) { $.get(options.closeKeepAlive, function() { jqxhr = fileUploadIframe(a); }); } else { jqxhr = fileUploadIframe(a); } } else if ((hasFileInputs || multipart) && fileAPI) { jqxhr = fileUploadXhr(a); } else { jqxhr = $.ajax(options); } $form.removeData('jqxhr').data('jqxhr', jqxhr); // clear element array for (var k=0; k < elements.length; k++) { elements[k] = null; } // fire 'notify' event this.trigger('form-submit-notify', [this, options]); return this; // utility fn for deep serialization function deepSerialize(extraData){ var serialized = $.param(extraData, options.traditional).split('&'); var len = serialized.length; var result = []; var i, part; for (i=0; i < len; i++) { // #252; undo param space replacement serialized[i] = serialized[i].replace(/\+/g,' '); part = serialized[i].split('='); // #278; use array instead of object storage, favoring array serializations result.push([decodeURIComponent(part[0]), decodeURIComponent(part[1])]); } return result; } // XMLHttpRequest Level 2 file uploads (big hat tip to francois2metz) function fileUploadXhr(a) { var formdata = new FormData(); for (var i=0; i < a.length; i++) { formdata.append(a[i].name, a[i].value); } if (options.extraData) { var serializedData = deepSerialize(options.extraData); for (i=0; i < serializedData.length; i++) { if (serializedData[i]) { formdata.append(serializedData[i][0], serializedData[i][1]); } } } options.data = null; var s = $.extend(true, {}, $.ajaxSettings, options, { contentType: false, processData: false, cache: false, type: method || 'POST' }); if (options.uploadProgress) { // workaround because jqXHR does not expose upload property s.xhr = function() { var xhr = $.ajaxSettings.xhr(); if (xhr.upload) { xhr.upload.addEventListener('progress', function(event) { var percent = 0; var position = event.loaded || event.position; /*event.position is deprecated*/ var total = event.total; if (event.lengthComputable) { percent = Math.ceil(position / total * 100); } options.uploadProgress(event, position, total, percent); }, false); } return xhr; }; } s.data = null; var beforeSend = s.beforeSend; s.beforeSend = function(xhr, o) { //Send FormData() provided by user if (options.formData) { o.data = options.formData; } else { o.data = formdata; } if(beforeSend) { beforeSend.call(this, xhr, o); } }; return $.ajax(s); } // private function for handling file uploads (hat tip to YAHOO!) function fileUploadIframe(a) { var form = $form[0], el, i, s, g, id, $io, io, xhr, sub, n, timedOut, timeoutHandle; var deferred = $.Deferred(); // #341 deferred.abort = function(status) { xhr.abort(status); }; if (a) { // ensure that every serialized input is still enabled for (i=0; i < elements.length; i++) { el = $(elements[i]); if ( hasProp ) { el.prop('disabled', false); } else { el.removeAttr('disabled'); } } } s = $.extend(true, {}, $.ajaxSettings, options); s.context = s.context || s; id = 'jqFormIO' + (new Date().getTime()); if (s.iframeTarget) { $io = $(s.iframeTarget); n = $io.attr2('name'); if (!n) { $io.attr2('name', id); } else { id = n; } } else { $io = $('<iframe name="' + id + '" src="'+ s.iframeSrc +'" />'); $io.css({ position: 'absolute', top: '-1000px', left: '-1000px' }); } io = $io[0]; xhr = { // mock object aborted: 0, responseText: null, responseXML: null, status: 0, statusText: 'n/a', getAllResponseHeaders: function() {}, getResponseHeader: function() {}, setRequestHeader: function() {}, abort: function(status) { var e = (status === 'timeout' ? 'timeout' : 'aborted'); log('aborting upload... ' + e); this.aborted = 1; try { // #214, #257 if (io.contentWindow.document.execCommand) { io.contentWindow.document.execCommand('Stop'); } } catch(ignore) {} $io.attr('src', s.iframeSrc); // abort op in progress xhr.error = e; if (s.error) { s.error.call(s.context, xhr, e, status); } if (g) { $.event.trigger("ajaxError", [xhr, s, e]); } if (s.complete) { s.complete.call(s.context, xhr, e); } } }; g = s.global; // trigger ajax global events so that activity/block indicators work like normal if (g && 0 === $.active++) { $.event.trigger("ajaxStart"); } if (g) { $.event.trigger("ajaxSend", [xhr, s]); } if (s.beforeSend && s.beforeSend.call(s.context, xhr, s) === false) { if (s.global) { $.active--; } deferred.reject(); return deferred; } if (xhr.aborted) { deferred.reject(); return deferred; } // add submitting element to data if we know it sub = form.clk; if (sub) { n = sub.name; if (n && !sub.disabled) { s.extraData = s.extraData || {}; s.extraData[n] = sub.value; if (sub.type == "image") { s.extraData[n+'.x'] = form.clk_x; s.extraData[n+'.y'] = form.clk_y; } } } var CLIENT_TIMEOUT_ABORT = 1; var SERVER_ABORT = 2; function getDoc(frame) { /* it looks like contentWindow or contentDocument do not * carry the protocol property in ie8, when running under ssl * frame.document is the only valid response document, since * the protocol is know but not on the other two objects. strange? * "Same origin policy" http://en.wikipedia.org/wiki/Same_origin_policy */ var doc = null; // IE8 cascading access check try { if (frame.contentWindow) { doc = frame.contentWindow.document; } } catch(err) { // IE8 access denied under ssl & missing protocol log('cannot get iframe.contentWindow document: ' + err); } if (doc) { // successful getting content return doc; } try { // simply checking may throw in ie8 under ssl or mismatched protocol doc = frame.contentDocument ? frame.contentDocument : frame.document; } catch(err) { // last attempt log('cannot get iframe.contentDocument: ' + err); doc = frame.document; } return doc; } // Rails CSRF hack (thanks to Yvan Barthelemy) var csrf_token = $('meta[name=csrf-token]').attr('content'); var csrf_param = $('meta[name=csrf-param]').attr('content'); if (csrf_param && csrf_token) { s.extraData = s.extraData || {}; s.extraData[csrf_param] = csrf_token; } // take a breath so that pending repaints get some cpu time before the upload starts function doSubmit() { // make sure form attrs are set var t = $form.attr2('target'), a = $form.attr2('action'), mp = 'multipart/form-data', et = $form.attr('enctype') || $form.attr('encoding') || mp; // update form attrs in IE friendly way form.setAttribute('target',id); if (!method || /post/i.test(method) ) { form.setAttribute('method', 'POST'); } if (a != s.url) { form.setAttribute('action', s.url); } // ie borks in some cases when setting encoding if (! s.skipEncodingOverride && (!method || /post/i.test(method))) { $form.attr({ encoding: 'multipart/form-data', enctype: 'multipart/form-data' }); } // support timout if (s.timeout) { timeoutHandle = setTimeout(function() { timedOut = true; cb(CLIENT_TIMEOUT_ABORT); }, s.timeout); } // look for server aborts function checkState() { try { var state = getDoc(io).readyState; log('state = ' + state); if (state && state.toLowerCase() == 'uninitialized') { setTimeout(checkState,50); } } catch(e) { log('Server abort: ' , e, ' (', e.name, ')'); cb(SERVER_ABORT); if (timeoutHandle) { clearTimeout(timeoutHandle); } timeoutHandle = undefined; } } // add "extra" data to form if provided in options var extraInputs = []; try { if (s.extraData) { for (var n in s.extraData) { if (s.extraData.hasOwnProperty(n)) { // if using the $.param format that allows for multiple values with the same name if($.isPlainObject(s.extraData[n]) && s.extraData[n].hasOwnProperty('name') && s.extraData[n].hasOwnProperty('value')) { extraInputs.push( $('<input type="hidden" name="'+s.extraData[n].name+'">').val(s.extraData[n].value) .appendTo(form)[0]); } else { extraInputs.push( $('<input type="hidden" name="'+n+'">').val(s.extraData[n]) .appendTo(form)[0]); } } } } if (!s.iframeTarget) { // add iframe to doc and submit the form $io.appendTo('body'); } if (io.attachEvent) { io.attachEvent('onload', cb); } else { io.addEventListener('load', cb, false); } setTimeout(checkState,15); try { form.submit(); } catch(err) { // just in case form has element with name/id of 'submit' var submitFn = document.createElement('form').submit; submitFn.apply(form); } } finally { // reset attrs and remove "extra" input elements form.setAttribute('action',a); form.setAttribute('enctype', et); // #380 if(t) { form.setAttribute('target', t); } else { $form.removeAttr('target'); } $(extraInputs).remove(); } } if (s.forceSync) { doSubmit(); } else { setTimeout(doSubmit, 10); // this lets dom updates render } var data, doc, domCheckCount = 50, callbackProcessed; function cb(e) { if (xhr.aborted || callbackProcessed) { return; } doc = getDoc(io); if(!doc) { log('cannot access response document'); e = SERVER_ABORT; } if (e === CLIENT_TIMEOUT_ABORT && xhr) { xhr.abort('timeout'); deferred.reject(xhr, 'timeout'); return; } else if (e == SERVER_ABORT && xhr) { xhr.abort('server abort'); deferred.reject(xhr, 'error', 'server abort'); return; } if (!doc || doc.location.href == s.iframeSrc) { // response not received yet if (!timedOut) { return; } } if (io.detachEvent) { io.detachEvent('onload', cb); } else { io.removeEventListener('load', cb, false); } var status = 'success', errMsg; try { if (timedOut) { throw 'timeout'; } var isXml = s.dataType == 'xml' || doc.XMLDocument || $.isXMLDoc(doc); log('isXml='+isXml); if (!isXml && window.opera && (doc.body === null || !doc.body.innerHTML)) { if (--domCheckCount) { // in some browsers (Opera) the iframe DOM is not always traversable when // the onload callback fires, so we loop a bit to accommodate log('requeing onLoad callback, DOM not available'); setTimeout(cb, 250); return; } // let this fall through because server response could be an empty document //log('Could not access iframe DOM after mutiple tries.'); //throw 'DOMException: not available'; } //log('response detected'); var docRoot = doc.body ? doc.body : doc.documentElement; xhr.responseText = docRoot ? docRoot.innerHTML : null; xhr.responseXML = doc.XMLDocument ? doc.XMLDocument : doc; if (isXml) { s.dataType = 'xml'; } xhr.getResponseHeader = function(header){ var headers = {'content-type': s.dataType}; return headers[header.toLowerCase()]; }; // support for XHR 'status' & 'statusText' emulation : if (docRoot) { xhr.status = Number( docRoot.getAttribute('status') ) || xhr.status; xhr.statusText = docRoot.getAttribute('statusText') || xhr.statusText; } var dt = (s.dataType || '').toLowerCase(); var scr = /(json|script|text)/.test(dt); if (scr || s.textarea) { // see if user embedded response in textarea var ta = doc.getElementsByTagName('textarea')[0]; if (ta) { xhr.responseText = ta.value; // support for XHR 'status' & 'statusText' emulation : xhr.status = Number( ta.getAttribute('status') ) || xhr.status; xhr.statusText = ta.getAttribute('statusText') || xhr.statusText; } else if (scr) { // account for browsers injecting pre around json response var pre = doc.getElementsByTagName('pre')[0]; var b = doc.getElementsByTagName('body')[0]; if (pre) { xhr.responseText = pre.textContent ? pre.textContent : pre.innerText; } else if (b) { xhr.responseText = b.textContent ? b.textContent : b.innerText; } } } else if (dt == 'xml' && !xhr.responseXML && xhr.responseText) { xhr.responseXML = toXml(xhr.responseText); } try { data = httpData(xhr, dt, s); } catch (err) { status = 'parsererror'; xhr.error = errMsg = (err || status); } } catch (err) { log('error caught: ',err); status = 'error'; xhr.error = errMsg = (err || status); } if (xhr.aborted) { log('upload aborted'); status = null; } if (xhr.status) { // we've set xhr.status status = (xhr.status >= 200 && xhr.status < 300 || xhr.status === 304) ? 'success' : 'error'; } // ordering of these callbacks/triggers is odd, but that's how $.ajax does it if (status === 'success') { if (s.success) { s.success.call(s.context, data, 'success', xhr); } deferred.resolve(xhr.responseText, 'success', xhr); if (g) { $.event.trigger("ajaxSuccess", [xhr, s]); } } else if (status) { if (errMsg === undefined) { errMsg = xhr.statusText; } if (s.error) { s.error.call(s.context, xhr, status, errMsg); } deferred.reject(xhr, 'error', errMsg); if (g) { $.event.trigger("ajaxError", [xhr, s, errMsg]); } } if (g) { $.event.trigger("ajaxComplete", [xhr, s]); } if (g && ! --$.active) { $.event.trigger("ajaxStop"); } if (s.complete) { s.complete.call(s.context, xhr, status); } callbackProcessed = true; if (s.timeout) { clearTimeout(timeoutHandle); } // clean up setTimeout(function() { if (!s.iframeTarget) { $io.remove(); } else { //adding else to clean up existing iframe response. $io.attr('src', s.iframeSrc); } xhr.responseXML = null; }, 100); } var toXml = $.parseXML || function(s, doc) { // use parseXML if available (jQuery 1.5+) if (window.ActiveXObject) { doc = new ActiveXObject('Microsoft.XMLDOM'); doc.async = 'false'; doc.loadXML(s); } else { doc = (new DOMParser()).parseFromString(s, 'text/xml'); } return (doc && doc.documentElement && doc.documentElement.nodeName != 'parsererror') ? doc : null; }; var parseJSON = $.parseJSON || function(s) { /*jslint evil:true */ return window['eval']('(' + s + ')'); }; var httpData = function( xhr, type, s ) { // mostly lifted from jq1.4.4 var ct = xhr.getResponseHeader('content-type') || '', xml = type === 'xml' || !type && ct.indexOf('xml') >= 0, data = xml ? xhr.responseXML : xhr.responseText; if (xml && data.documentElement.nodeName === 'parsererror') { if ($.error) { $.error('parsererror'); } } if (s && s.dataFilter) { data = s.dataFilter(data, type); } if (typeof data === 'string') { if (type === 'json' || !type && ct.indexOf('json') >= 0) { data = parseJSON(data); } else if (type === "script" || !type && ct.indexOf("javascript") >= 0) { $.globalEval(data); } } return data; }; return deferred; }};/** * ajaxForm() provides a mechanism for fully automating form submission. * * The advantages of using this method instead of ajaxSubmit() are: * * 1: This method will include coordinates for <input type="image" /> elements (if the element * is used to submit the form). * 2. This method will include the submit element's name/value data (for the element that was * used to submit the form). * 3. This method binds the submit() method to the form for you. * * The options argument for ajaxForm works exactly as it does for ajaxSubmit. ajaxForm merely * passes the options argument along after properly binding events for submit elements and * the form itself. */$.fn.ajaxForm = function(options) { options = options || {}; options.delegation = options.delegation && $.isFunction($.fn.on); // in jQuery 1.3+ we can fix mistakes with the ready state if (!options.delegation && this.length === 0) { var o = { s: this.selector, c: this.context }; if (!$.isReady && o.s) { log('DOM not ready, queuing ajaxForm'); $(function() { $(o.s,o.c).ajaxForm(options); }); return this; } // is your DOM ready? http://docs.jquery.com/Tutorials:Introducing_$(document).ready() log('terminating; zero elements found by selector' + ($.isReady ? '' : ' (DOM not ready)')); return this; } if ( options.delegation ) { $(document) .off('submit.form-plugin', this.selector, doAjaxSubmit) .off('click.form-plugin', this.selector, captureSubmittingElement) .on('submit.form-plugin', this.selector, options, doAjaxSubmit) .on('click.form-plugin', this.selector, options, captureSubmittingElement); return this; } return this.ajaxFormUnbind() .bind('submit.form-plugin', options, doAjaxSubmit) .bind('click.form-plugin', options, captureSubmittingElement);};// private event handlersfunction doAjaxSubmit(e) { /*jshint validthis:true */ var options = e.data; if (!e.isDefaultPrevented()) { // if event has been canceled, don't proceed e.preventDefault(); $(e.target).ajaxSubmit(options); // #365 }}function captureSubmittingElement(e) { /*jshint validthis:true */ var target = e.target; var $el = $(target); if (!($el.is("[type=submit],[type=image]"))) { // is this a child element of the submit el? (ex: a span within a button) var t = $el.closest('[type=submit]'); if (t.length === 0) { return; } target = t[0]; } var form = this; form.clk = target; if (target.type == 'image') { if (e.offsetX !== undefined) { form.clk_x = e.offsetX; form.clk_y = e.offsetY; } else if (typeof $.fn.offset == 'function') { var offset = $el.offset(); form.clk_x = e.pageX - offset.left; form.clk_y = e.pageY - offset.top; } else { form.clk_x = e.pageX - target.offsetLeft; form.clk_y = e.pageY - target.offsetTop; } } // clear form vars setTimeout(function() { form.clk = form.clk_x = form.clk_y = null; }, 100);}// ajaxFormUnbind unbinds the event handlers that were bound by ajaxForm$.fn.ajaxFormUnbind = function() { return this.unbind('submit.form-plugin click.form-plugin');};/** * formToArray() gathers form element data into an array of objects that can * be passed to any of the following ajax functions: $.get, $.post, or load. * Each object in the array has both a 'name' and 'value' property. An example of * an array for a simple login form might be: * * [ { name: 'username', value: 'jresig' }, { name: 'password', value: 'secret' } ] * * It is this array that is passed to pre-submit callback functions provided to the * ajaxSubmit() and ajaxForm() methods. */$.fn.formToArray = function(semantic, elements) { var a = []; if (this.length === 0) { return a; } var form = this[0]; var formId = this.attr('id'); var els = semantic ? form.getElementsByTagName('*') : form.elements; var els2; if (els && !/MSIE [678]/.test(navigator.userAgent)) { // #390 els = $(els).get(); // convert to standard array } // #386; account for inputs outside the form which use the 'form' attribute if ( formId ) { els2 = $(':input[form="' + formId + '"]').get(); // hat tip @thet if ( els2.length ) { els = (els || []).concat(els2); } } if (!els || !els.length) { return a; } var i,j,n,v,el,max,jmax; for(i=0, max=els.length; i < max; i++) { el = els[i]; n = el.name; if (!n || el.disabled) { continue; } if (semantic && form.clk && el.type == "image") { // handle image inputs on the fly when semantic == true if(form.clk == el) { a.push({name: n, value: $(el).val(), type: el.type }); a.push({name: n+'.x', value: form.clk_x}, {name: n+'.y', value: form.clk_y}); } continue; } v = $.fieldValue(el, true); if (v && v.constructor == Array) { if (elements) { elements.push(el); } for(j=0, jmax=v.length; j < jmax; j++) { a.push({name: n, value: v[j]}); } } else if (feature.fileapi && el.type == 'file') { if (elements) { elements.push(el); } var files = el.files; if (files.length) { for (j=0; j < files.length; j++) { a.push({name: n, value: files[j], type: el.type}); } } else { // #180 a.push({ name: n, value: '', type: el.type }); } } else if (v !== null && typeof v != 'undefined') { if (elements) { elements.push(el); } a.push({name: n, value: v, type: el.type, required: el.required}); } } if (!semantic && form.clk) { // input type=='image' are not found in elements array! handle it here var $input = $(form.clk), input = $input[0]; n = input.name; if (n && !input.disabled && input.type == 'image') { a.push({name: n, value: $input.val()}); a.push({name: n+'.x', value: form.clk_x}, {name: n+'.y', value: form.clk_y}); } } return a;};/** * Serializes form data into a 'submittable' string. This method will return a string * in the format: name1=value1&name2=value2 */$.fn.formSerialize = function(semantic) { //hand off to jQuery.param for proper encoding return $.param(this.formToArray(semantic));};/** * Serializes all field elements in the jQuery object into a query string. * This method will return a string in the format: name1=value1&name2=value2 */$.fn.fieldSerialize = function(successful) { var a = []; this.each(function() { var n = this.name; if (!n) { return; } var v = $.fieldValue(this, successful); if (v && v.constructor == Array) { for (var i=0,max=v.length; i < max; i++) { a.push({name: n, value: v[i]}); } } else if (v !== null && typeof v != 'undefined') { a.push({name: this.name, value: v}); } }); //hand off to jQuery.param for proper encoding return $.param(a);};/** * Returns the value(s) of the element in the matched set. For example, consider the following form: * * <form><fieldset> * <input name="A" type="text" /> * <input name="A" type="text" /> * <input name="B" type="checkbox" value="B1" /> * <input name="B" type="checkbox" value="B2"/> * <input name="C" type="radio" value="C1" /> * <input name="C" type="radio" value="C2" /> * </fieldset></form> * * var v = $('input[type=text]').fieldValue(); * // if no values are entered into the text inputs * v == ['',''] * // if values entered into the text inputs are 'foo' and 'bar' * v == ['foo','bar'] * * var v = $('input[type=checkbox]').fieldValue(); * // if neither checkbox is checked * v === undefined * // if both checkboxes are checked * v == ['B1', 'B2'] * * var v = $('input[type=radio]').fieldValue(); * // if neither radio is checked * v === undefined * // if first radio is checked * v == ['C1'] * * The successful argument controls whether or not the field element must be 'successful' * (per http://www.w3.org/TR/html4/interact/forms.html#successful-controls). * The default value of the successful argument is true. If this value is false the value(s) * for each element is returned. * * Note: This method *always* returns an array. If no valid value can be determined the * array will be empty, otherwise it will contain one or more values. */$.fn.fieldValue = function(successful) { for (var val=[], i=0, max=this.length; i < max; i++) { var el = this[i]; var v = $.fieldValue(el, successful); if (v === null || typeof v == 'undefined' || (v.constructor == Array && !v.length)) { continue; } if (v.constructor == Array) { $.merge(val, v); } else { val.push(v); } } return val;};/** * Returns the value of the field element. */$.fieldValue = function(el, successful) { var n = el.name, t = el.type, tag = el.tagName.toLowerCase(); if (successful === undefined) { successful = true; } if (successful && (!n || el.disabled || t == 'reset' || t == 'button' || (t == 'checkbox' || t == 'radio') && !el.checked || (t == 'submit' || t == 'image') && el.form && el.form.clk != el || tag == 'select' && el.selectedIndex == -1)) { return null; } if (tag == 'select') { var index = el.selectedIndex; if (index < 0) { return null; } var a = [], ops = el.options; var one = (t == 'select-one'); var max = (one ? index+1 : ops.length); for(var i=(one ? index : 0); i < max; i++) { var op = ops[i]; if (op.selected) { var v = op.value; if (!v) { // extra pain for IE... v = (op.attributes && op.attributes.value && !(op.attributes.value.specified)) ? op.text : op.value; } if (one) { return v; } a.push(v); } } return a; } return $(el).val();};/** * Clears the form data. Takes the following actions on the form's input fields: * - input text fields will have their 'value' property set to the empty string * - select elements will have their 'selectedIndex' property set to -1 * - checkbox and radio inputs will have their 'checked' property set to false * - inputs of type submit, button, reset, and hidden will *not* be effected * - button elements will *not* be effected */$.fn.clearForm = function(includeHidden) { return this.each(function() { $('input,select,textarea', this).clearFields(includeHidden); });};/** * Clears the selected form elements. */$.fn.clearFields = $.fn.clearInputs = function(includeHidden) { var re = /^(?:color|date|datetime|email|month|number|password|range|search|tel|text|time|url|week)$/i; // 'hidden' is not in this list return this.each(function() { var t = this.type, tag = this.tagName.toLowerCase(); if (re.test(t) || tag == 'textarea') { this.value = ''; } else if (t == 'checkbox' || t == 'radio') { this.checked = false; } else if (tag == 'select') { this.selectedIndex = -1; } else if (t == "file") { if (/MSIE/.test(navigator.userAgent)) { $(this).replaceWith($(this).clone(true)); } else { $(this).val(''); } } else if (includeHidden) { // includeHidden can be the value true, or it can be a selector string // indicating a special test; for example: // $('#myForm').clearForm('.special:hidden') // the above would clean hidden inputs that have the class of 'special' if ( (includeHidden === true && /hidden/.test(t)) || (typeof includeHidden == 'string' && $(this).is(includeHidden)) ) { this.value = ''; } } });};/** * Resets the form data. Causes all form elements to be reset to their original value. */$.fn.resetForm = function() { return this.each(function() { // guard against an input with the name of 'reset' // note that IE reports the reset function as an 'object' if (typeof this.reset == 'function' || (typeof this.reset == 'object' && !this.reset.nodeType)) { this.reset(); } });};/** * Enables or disables any matching elements. */$.fn.enable = function(b) { if (b === undefined) { b = true; } return this.each(function() { this.disabled = !b; });};/** * Checks/unchecks any matching checkboxes or radio buttons and * selects/deselects and matching option elements. */$.fn.selected = function(select) { if (select === undefined) { select = true; } return this.each(function() { var t = this.type; if (t == 'checkbox' || t == 'radio') { this.checked = select; } else if (this.tagName.toLowerCase() == 'option') { var $sel = $(this).parent('select'); if (select && $sel[0] && $sel[0].type == 'select-one') { // deselect all other options $sel.find('option').selected(false); } this.selected = select; } });};// expose debug var$.fn.ajaxSubmit.debug = false;// helper fn for console loggingfunction log() { if (!$.fn.ajaxSubmit.debug) { return; } var msg = '[jquery.form] ' + Array.prototype.join.call(arguments,''); if (window.console && window.console.log) { window.console.log(msg); } else if (window.opera && window.opera.postError) { window.opera.postError(msg); }}}));以下是来源于：http://www.cnblogs.com/luluping/archive/2009/04/15/1436177.html
Form插件翻译成中文的操作，支持Ajax，支持Ajax文件上传，功能强大，基本满足日常应用。
1、JQuery框架软件包下载
文件:jquery.rar大小:29KB下载:下载2、Form插件下载
文件:jquery.form.rar大小:7KB下载:下载3、Form插件的简单入门
第一步：先增加一个表单
<form id="myForm" action="comment.php" method="post">
Name: <input type="text" name="name" />
Comment: <textarea name="comment"></textarea>
<input type="submit" value="Submit Comment" />
</form>
<head>
<script type="text/javascript" src="path/to/jquery.js"></script>
<script type="text/javascript" src="path/to/form.js"></script>
<script type="text/javascript">
// wait for the DOM to be loaded
$(document).ready(function() {
// bind 'myForm' and provide a simple callback function
$('#myForm').ajaxForm(function() {
alert("Thank you for your comment!");
});
});
</script>
</head>
http://www.malsup.com/jquery/form/
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该插件的作者在介绍form.js时，说了这样的一句话：
Submitting a form with AJAX doesn't get any easier than this!
表单插件API
英文原文：http://www.malsup.com/jquery/form/#api
表单插件API提供了几个方法，让你轻松管理表单数据和进行表单提交。
ajaxForm
增加所有需要的事件监听器，为AJAX提交表单做好准备。ajaxForm不能提交表单。在document的ready函数中，使用ajaxForm来为AJAX提交表单进行准备。ajaxForm接受0个或1个参数。这个单个的参数既可以是一个回调函数，也可以是一个Options对象。
可链接（Chainable）：可以。
实例：
$('#myFormId').ajaxForm();
ajaxSubmit
马上由AJAX来提交表单。大多数情况下，都是调用ajaxSubmit来对用户提交表单进行响应。ajaxSubmit接受0个或1个参数。这个单个的参数既可以是一个回调函数，也可以是一个Options对象。
可链接（Chainable）：可以。
实例：
// 绑定表单提交事件处理器
$('#myFormId').submit(function() {
// 提交表单
$(this).ajaxSubmit();
// 为了防止普通浏览器进行表单提交和产生页面导航（防止页面刷新？）返回false
return false;
});
formSerialize
将表单串行化（或序列化）成一个查询字符串。这个方法将返回以下格式的字符串：name1=value1&name2=value2。
可链接（Chainable）：不能， 这个方法返回一个字符串。
实例：
var queryString = $('#myFormId').formSerialize();
// 现在可以使用$.get、$.post、$.ajax等来提交数据
$.post('myscript.php', queryString);
fieldSerialize
将表单的字段元素串行化（或序列化）成一个查询字符串。当只有部分表单字段需要进行串行化（或序列化）时，这个就方便了。这个方法将返回以下格式的字符串：name1=value1&name2=value2。
可链接（Chainable）：不能，这个方法返回一个字符串。
实例：
var queryString = $('#myFormId .specialFields').fieldSerialize();
fieldValue
返回匹配插入数组中的表单元素值。从0.91版起，该方法将总是以数组的形式返回数据。如果元素值被判定可能无效，则数组为空，否则它将包含一个或多于一个的元素值。
可链接（Chainable）：不能，该方法返回数组。
实例：
// 取得密码输入值
var value = $('#myFormId :password').fieldValue();
alert('The password is: ' + value[0]);
resetForm
通过调用表单元素原有的DOM方法，将表单恢复到初始状态。
可链接（Chainable）：可以。
实例：
$('#myFormId').resetForm();
clearForm
清除表单元素。该方法将所有的文本（text）输入字段、密码（password）输入字段和文本区域（textarea）字段置空，清除任何select元素中的选定，以及将所有的单选（radio）按钮和多选（checkbox）按钮重置为非选定状态。
可链接（Chainable）：可以。
$('#myFormId').clearForm();
clearFields
清除字段元素。只有部分表单元素需要清除时才方便使用。
可链接（Chainable）：可以。
$('#myFormId .specialFields').clearFields();
Options对象
ajaxForm和ajaxSubmit都支持众多的选项参数，这些选项参数可以使用一个Options对象来提供。Options只是一个JavaScript对象，它包含了如下一些属性与值的集合：
target
指明页面中由服务器响应进行更新的元素。元素的值可能被指定为一个jQuery选择器字符串，一个jQuery对象，或者一个DOM元素。
默认值：null。
url
指定提交表单数据的URL。
默认值：表单的action属性值
type
指定提交表单数据的方法（method）：“GET”或“POST”。
默认值：表单的method属性值（如果没有找到默认为“GET”）。
beforeSubmit
表单提交前被调用的回调函数。“beforeSubmit”回调函数作为一个钩子（hook），被提供来运行预提交逻辑或者校验表单数据。如果“beforeSubmit”回调函数返回false，那么表单将不被提交。“beforeSubmit”回调函数带三个调用参数：数组形式的表单数据，jQuery表单对象，以及传入ajaxForm/ajaxSubmit中的Options对象。表单数组接受以下方式的数据：
[ { name: 'username', value: 'jresig' }, { name: 'password', value: 'secret' } ]
默认值：null
success
表单成功提交后调用的回调函数。如果提供“success”回调函数，当从服务器返回响应后它被调用。然后由dataType选项值决定传回responseText还是responseXML的值。
默认值：null
dataType
期望返回的数据类型。null、“xml”、“script”或者“json”其中之一。dataType提供一种方法，它规定了怎样处理服务器的响应。这个被直接地反映到jQuery.httpData方法中去。下面的值被支持：
'xml'：如果dataType == 'xml'，将把服务器响应作为XML来对待。同时，如果“success”回调方法被指定， 将传回responseXML值。
'json'：如果dataType == 'json'， 服务器响应将被求值，并传递到“success”回调方法，如果它被指定的话。
'script'：如果dataType == 'script'， 服务器响应将求值成纯文本。
默认值：null（服务器返回responseText值）
semantic
Boolean flag indicating whether data must be submitted in strict semantic order (slower). Note that the normal form serialization is done in semantic order with the exception of input elements of type="image". You should only set the semantic option to true if your server has strict semantic requirements and your form contains an input element of type="image".
布尔标志，表示数据是否必须严格按照语义顺序（slower？）来进行提交。注意：一般来说，表单已经按照语义顺序来进行了串行化（或序列化），除了type="image"的input元素。如果你的服务器有严格的语义要求，以及表单中包含有一个type="image"的input元素，就应该将semantic设置为true。（译注：这一段由于无法理解，翻译出来可能语不达意，但请达人指正。）
默认值：false
resetForm
布尔标志，表示如果表单提交成功是否进行重置。
Default value: null
clearForm
布尔标志，表示如果表单提交成功是否清除表单数据。
默认值：null
实例：
// 准备好Options对象
var options = {
target: '#divToUpdate',
url: 'comment.php',
success: function() {
alert('Thanks for your comment!');
} };
// 将options传给ajaxForm
$('#myForm').ajaxForm(options);
注意：Options对象还可以用来将值传递给jQuery的$.ajax方法。如果你熟悉$.ajax所支持的options，你可以利用它们来将Options对象传递给ajaxForm和ajaxSubmit。
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