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/*!

 * jQuery Form Plugin

 * version: 3.20 (20-NOV-2012)

 * @requires jQuery v1.5 or later

 *

 * Examples and documentation at: http://malsup.com/jquery/form/

 * Project repository: https://github.com/malsup/form

 * Dual licensed under the MIT and GPL licenses:

 *    http://malsup.github.com/mit-license.txt

 *    http://malsup.github.com/gpl-license-v2.txt

 */

/*global ActiveXObject alert */

;(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;

/**

 * 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 };

    }

    method = this.attr('method');

    action = this.attr('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 || 'GET',

        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]);

        }

    };

    // 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[value!=""]', this);

    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).split('&');

        var len = serialized.length;

        var result = {};

        var i, part;

        for (i=0; i < len; i++) {

            part = serialized[i].split('=');

            result[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 (var p in serializedData)

                if (serializedData.hasOwnProperty(p))

                    formdata.append(p, serializedData[p]);

        }

        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 = jQuery.ajaxSettings.xhr();

                if (xhr.upload) {

                    xhr.upload.onprogress = 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);

                    };

                }

                return xhr;

            };

        }

        s.data = null;

            var beforeSend = s.beforeSend;

            s.beforeSend = function(xhr, o) {

                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 useProp = !!$.fn.prop;

        var deferred = $.Deferred();

        if ($('[name=submit],[id=submit]', form).length) {

            // if there is an input with a name or id of 'submit' then we won't be

            // able to invoke the submit fn on the form (at least not x-browser)

            alert('Error: Form elements must not have name or id of "submit".');

            deferred.reject();

            return deferred;

        }

        if (a) {

            // ensure that every serialized input is still enabled

            for (i=0; i < elements.length; i++) {

                el = $(elements[i]);

                if ( useProp )

                    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.attr('name');

            if (!n)

                 $io.attr('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;

                // #214

                if (io.contentWindow.document.execCommand) {

                    try { // #214

                        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) {

            var doc = frame.contentWindow ? frame.contentWindow.document : frame.contentDocument ? frame.contentDocument : 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.attr('target'), a = $form.attr('action');

            // update form attrs in IE friendly way

            form.setAttribute('target',id);

            if (!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+'">').attr('value',s.extraData[n].value)

                                   .appendTo(form)[0]);

                           } else {

                               extraInputs.push(

                               $('<input type="hidden" name="'+n+'">').attr('value',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);

                form.submit();

            }

            finally {

                // reset attrs and remove "extra" input elements

                form.setAttribute('action',a);

                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;

            }

            try {

                doc = getDoc(io);

            }

            catch(ex) {

                log('cannot access response document: ', ex);

                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];

                };

                // 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 (e) {

                    status = 'parsererror';

                    xhr.error = errMsg = (e || status);

                }

            }

            catch (e) {

                log('error caught: ',e);

                status = 'error';

                xhr.error = errMsg = (e || 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();

                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 handlers

function doAjaxSubmit(e) {

    /*jshint validthis:true */

    var options = e.data;

    if (!e.isDefaultPrevented()) { // if event has been canceled, don't proceed

        e.preventDefault();

        $(this).ajaxSubmit(options);

    }

}

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 els = semantic ? form.getElementsByTagName('*') : form.elements;

    if (!els) {

        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) {

            continue;

        }

        if (semantic && form.clk && el.type == "image") {

            // handle image inputs on the fly when semantic == true

            if(!el.disabled && 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' && !el.disabled) {

            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) {