/*!
 * jQuery Form Plugin
 * version: 3.32.0-2013.04.09
 * @requires jQuery v1.5 or later
 * Copyright (c) 2013 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 */
;(function($) {
"use strict";

/**
 * 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 };
    }

    method = this.attr2('method');
    action = 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 || '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++) {
            // #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 = jQuery.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) {
                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();

        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');

            // 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+'">').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);
                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];
                };
                // 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();
                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 || 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&amp;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&amp;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 logging
function 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);
    }
}

})(jQuery);
