/*

 * jQuery Form Plugin

 * version: 2.02 (12/16/2007)

 * @requires jQuery v1.1 or later

 *

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

 * Dual licensed under the MIT and GPL licenses:

 *   http://www.opensource.org/licenses/mit-license.php

 *   http://www.gnu.org/licenses/gpl.html

 *

 * Revision: $Id$

 */

 (function($) {

/**

 * ajaxSubmit() provides a mechanism for submitting an HTML form using AJAX.

 *

 * ajaxSubmit accepts a single argument which can be either a success callback function

 * or an options Object.  If a function is provided it will be invoked upon successful

 * completion of the submit and will be passed the response from the server.

 * If an options Object is provided, the following attributes are supported:

 *

 *  target:   Identifies the element(s) in the page to be updated with the server response.

 *            This value may be specified as a jQuery selection string, a jQuery object,

 *            or a DOM element.

 *            default value: null

 *

 *  url:      URL to which the form data will be submitted.

 *            default value: value of form's 'action' attribute

 *

 *  type:     The method in which the form data should be submitted, 'GET' or 'POST'.

 *            default value: value of form's 'method' attribute (or 'GET' if none found)

 *

 *  data:     Additional data to add to the request, specified as key/value pairs (see $.ajax).

 *

 *  beforeSubmit:  Callback method to be invoked before the form is submitted.

 *            default value: null

 *

 *  success:  Callback method to be invoked after the form has been successfully submitted

 *            and the response has been returned from the server

 *            default value: null

 *

 *  dataType: Expected dataType of the response.  One of: null, 'xml', 'script', or 'json'

 *            default value: null

 *

 *  semantic: Boolean flag indicating whether data must be submitted in semantic order (slower).

 *            default value: false

 *

 *  resetForm: Boolean flag indicating whether the form should be reset if the submit is successful

 *

 *  clearForm: Boolean flag indicating whether the form should be cleared if the submit is successful

 *

 *

 * The 'beforeSubmit' callback can be provided as a hook for running pre-submit logic or for

 * validating the form data.  If the 'beforeSubmit' callback returns false then the form will

 * not be submitted. The 'beforeSubmit' callback is invoked with three arguments: the form data

 * in array format, the jQuery object, and the options object passed into ajaxSubmit.

 * The form data array takes the following form:

 *

 *     [ { name: 'username', value: 'jresig' }, { name: 'password', value: 'secret' } ]

 *

 * If a 'success' callback method is provided it is invoked after the response has been returned

 * from the server.  It is passed the responseText or responseXML value (depending on dataType).

 * See jQuery.ajax for further details.

 *

 *

 * The dataType option provides a means for specifying how the server response should be handled.

 * This maps directly to the jQuery.httpData method.  The following values are supported:

 *

 *      'xml':    if dataType == 'xml' the server response is treated as XML and the 'success'

 *                   callback method, if specified, will be passed the responseXML value

 *      'json':   if dataType == 'json' the server response will be evaluted and passed to

 *                   the 'success' callback, if specified

 *      'script': if dataType == 'script' the server response is evaluated in the global context

 *

 *

 * Note that it does not make sense to use both the 'target' and 'dataType' options.  If both

 * are provided the target will be ignored.

 *

 * The semantic argument can be used to force form serialization in semantic order.

 * This is normally true anyway, unless the form contains input elements of type='image'.

 * If your form must be submitted with name/value pairs in semantic order and your form

 * contains an input of type='image" then pass true for this arg, otherwise pass false

 * (or nothing) to avoid the overhead for this logic.

 *

 *

 * When used on its own, ajaxSubmit() is typically bound to a form's submit event like this:

 *

 * $("#form-id").submit(function() {

 *     $(this).ajaxSubmit(options);

 *     return false; // cancel conventional submit

 * });

 *

 * When using ajaxForm(), however, this is done for you.

 *

 * @example

 * $('#myForm').ajaxSubmit(function(data) {

 *     alert('Form submit succeeded! Server returned: ' + data);

 * });

 * @desc Submit form and alert server response

 *

 *

 * @example

 * var options = {

 *     target: '#myTargetDiv'

 * };

 * $('#myForm').ajaxSubmit(options);

 * @desc Submit form and update page element with server response

 *

 *

 * @example

 * var options = {

 *     success: function(responseText) {

 *         alert(responseText);

 *     }

 * };

 * $('#myForm').ajaxSubmit(options);

 * @desc Submit form and alert the server response

 *

 *

 * @example

 * var options = {

 *     beforeSubmit: function(formArray, jqForm) {

 *         if (formArray.length == 0) {

 *             alert('Please enter data.');

 *             return false;

 *         }

 *     }

 * };

 * $('#myForm').ajaxSubmit(options);

 * @desc Pre-submit validation which aborts the submit operation if form data is empty

 *

 *

 * @example

 * var options = {

 *     url: myJsonUrl.php,

 *     dataType: 'json',

 *     success: function(data) {

 *        // 'data' is an object representing the the evaluated json data

 *     }

 * };

 * $('#myForm').ajaxSubmit(options);

 * @desc json data returned and evaluated

 *

 *

 * @example

 * var options = {

 *     url: myXmlUrl.php,

 *     dataType: 'xml',

 *     success: function(responseXML) {

 *        // responseXML is XML document object

 *        var data = $('myElement', responseXML).text();

 *     }

 * };

 * $('#myForm').ajaxSubmit(options);

 * @desc XML data returned from server

 *

 *

 * @example

 * var options = {

 *     resetForm: true

 * };

 * $('#myForm').ajaxSubmit(options);

 * @desc submit form and reset it if successful

 *

 * @example

 * $('#myForm).submit(function() {

 *    $(this).ajaxSubmit();

 *    return false;

 * });

 * @desc Bind form's submit event to use ajaxSubmit

 *

 *

 * @name ajaxSubmit

 * @type jQuery

 * @param options  object literal containing options which control the form submission process

 * @cat Plugins/Form

 * @return jQuery

 */

$.fn.ajaxSubmit = function(options) {

    if (typeof options == 'function')

        options = { success: options };

    options = $.extend({

        url:  this.attr('action') || window.location.toString(),

        type: this.attr('method') || 'GET'

    }, options || {});

    // hook for manipulating the form data before it is extracted;

    // convenient for use with rich editors like tinyMCE or FCKEditor

    var veto = {};

    $.event.trigger('form.pre.serialize', [this, options, veto]);

    if (veto.veto) return this;

    var a = this.formToArray(options.semantic);

	if (options.data) {

	    for (var n in options.data)

	        a.push( { name: n, value: options.data[n] } );

	}

    // give pre-submit callback an opportunity to abort the submit

    if (options.beforeSubmit && options.beforeSubmit(a, this, options) === false) return this;

    // fire vetoable 'validate' event

    $.event.trigger('form.submit.validate', [a, this, options, veto]);

    if (veto.veto) return this;

    var q = $.param(a);//.replace(/%20/g,'+');

    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 $form = this, callbacks = [];

    if (options.resetForm) callbacks.push(function() { $form.resetForm(); });

    if (options.clearForm) callbacks.push(function() { $form.clearForm(); });

    // 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) {

            if (this.evalScripts)

                $(options.target).attr("innerHTML", data).evalScripts().each(oldSuccess, arguments);

            else // jQuery v1.1.4

                $(options.target).html(data).each(oldSuccess, arguments);

        });

    }

    else if (options.success)

        callbacks.push(options.success);

    options.success = function(data, status) {

        for (var i=0, max=callbacks.length; i < max; i++)

            callbacks[i](data, status, $form);

    };

    // are there files to upload?

    var files = $('input:file', this).fieldValue();

    var found = false;

    for (var j=0; j < files.length; j++)

        if (files[j])

            found = true;

    // options.iframe allows user to force iframe mode

   if (options.iframe || found) { 

       // hack to fix Safari hang (thanks to Tim Molendijk for this)

       // see:  http://groups.google.com/group/jquery-dev/browse_thread/thread/36395b7ab510dd5d

       if ($.browser.safari && options.closeKeepAlive)

           $.get(options.closeKeepAlive, fileUpload);

       else

           fileUpload();

       }

   else

       $.ajax(options);

    // fire 'notify' event

    $.event.trigger('form.submit.notify', [this, options]);

    return this;

    // private function for handling file uploads (hat tip to YAHOO!)

    function fileUpload() {

        var form = $form[0];

        var opts = $.extend({}, $.ajaxSettings, options);

        var id = 'jqFormIO' + $.fn.ajaxSubmit.counter++;

        var $io = $('<iframe id="' + id + '" name="' + id + '" />');

        var io = $io[0];

        var op8 = $.browser.opera && window.opera.version() < 9;

        if ($.browser.msie || op8) io.src = 'javascript:false;document.write("");';

        $io.css({ position: 'absolute', top: '-1000px', left: '-1000px' });

        var xhr = { // mock object

            responseText: null,

            responseXML: null,

            status: 0,

            statusText: 'n/a',

            getAllResponseHeaders: function() {},

            getResponseHeader: function() {},

            setRequestHeader: function() {}

        };

        var g = opts.global;

        // trigger ajax global events so that activity/block indicators work like normal

        if (g && ! $.active++) $.event.trigger("ajaxStart");

        if (g) $.event.trigger("ajaxSend", [xhr, opts]);

        var cbInvoked = 0;

        var timedOut = 0;

        // take a breath so that pending repaints get some cpu time before the upload starts

        setTimeout(function() {

            // make sure form attrs are set

            var encAttr = form.encoding ? 'encoding' : 'enctype';

            var t = $form.attr('target');

            $form.attr({

                target:   id,

                method:  'POST',

                action:   opts.url

            });

            form[encAttr] = 'multipart/form-data';

            // support timout

            if (opts.timeout)

                setTimeout(function() { timedOut = true; cb(); }, opts.timeout);

            // add iframe to doc and submit the form

            $io.appendTo('body');

            io.attachEvent ? io.attachEvent('onload', cb) : io.addEventListener('load', cb, false);

            form.submit();

            $form.attr('target', t); // reset target

        }, 10);

        function cb() {

            if (cbInvoked++) return;

            io.detachEvent ? io.detachEvent('onload', cb) : io.removeEventListener('load', cb, false);

            var ok = true;

            try {

                if (timedOut) throw 'timeout';

                // extract the server response from the iframe

                var data, doc;

                doc = io.contentWindow ? io.contentWindow.document : io.contentDocument ? io.contentDocument : io.document;

                xhr.responseText = doc.body ? doc.body.innerHTML : null;

                xhr.responseXML = doc.XMLDocument ? doc.XMLDocument : doc;

                if (opts.dataType == 'json' || opts.dataType == 'script') {

                    var ta = doc.getElementsByTagName('textarea')[0];

                    data = ta ? ta.value : xhr.responseText;

                    if (opts.dataType == 'json')

                        eval("data = " + data);

                    else

                        $.globalEval(data);

                }

                else if (opts.dataType == 'xml') {

                    data = xhr.responseXML;

                    if (!data && xhr.responseText != null)

                        data = toXml(xhr.responseText);

                }

                else {

                    data = xhr.responseText;

                }

            }

            catch(e){

                ok = false;

                $.handleError(opts, xhr, 'error', e);

            }

            // ordering of these callbacks/triggers is odd, but that's how $.ajax does it

            if (ok) {

                opts.success(data, 'success');

                if (g) $.event.trigger("ajaxSuccess", [xhr, opts]);

            }

            if (g) $.event.trigger("ajaxComplete", [xhr, opts]);

            if (g && ! --$.active) $.event.trigger("ajaxStop");

            if (opts.complete) opts.complete(xhr, ok ? 'success' : 'error');

            // clean up

            setTimeout(function() {

                $io.remove();

                xhr.responseXML = null;

            }, 100);

        };

        function toXml(s, doc) {

            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.tagName != 'parsererror') ? doc : null;

        };

    };

};

$.fn.ajaxSubmit.counter = 0; // used to create unique iframe ids

/**

 * 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.

 *