/*

 * jQuery Form Plugin

 * version: 2.07 (03/04/2008)

 * @requires jQuery v1.2.2 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 = {};

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

    if (veto.veto) return this;



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

    if (options.data) {

        options.extraData = 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

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

    if (veto.veto) return this;



    var q = $.param(a);



    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) {

            $(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

    this.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' + (new Date().getTime());

        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 t = $form.attr('target'), a = $form.attr('action');

            $form.attr({

                target:   id,

                encoding: 'multipart/form-data',

                enctype:  'multipart/form-data',

                method:   'POST',

                action:   opts.url

            });



            // support timout

            if (opts.timeout)

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



            // add "extra" data to form if provided in options

            var extraInputs = [];

            try {

                if (options.extraData)

                    for (var n in options.extraData)

                        extraInputs.push(

                            $('<input type="hidden" name="'+n+'" value="'+options.extraData[n]+'" />')

                                .appendTo(form)[0]);

            

                // add iframe to doc and submit the form

                $io.appendTo('body');

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

                form.submit();

            }

            finally {

                // reset attrs and remove "extra" input elements

                $form.attr('action', a);

                t ? $form.attr('target', t) : $form.removeAttr('target');

                $(extraInputs).remove();

            }

        }, 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;

                xhr.getResponseHeader = function(header){

                    var headers = {'content-type': opts.dataType};

                    return headers[header];

                };



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

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

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

                }

                else if (opts.dataType == 'xml' && !xhr.responseXML && xhr.responseText != null) {

                    xhr.responseXML = toXml(xhr.responseText);

                }

                data = $.httpData(xhr, opts.dataType);

            }

            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;

        };

    };

};



/**

 * 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.

 *

 * Note that for accurate x/y coordinates of image submit elements in all browsers

 * you need to also use the "dimensions" plugin (this method will auto-detect its presence).

 *

 * 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.  See ajaxSubmit for a full description of the options argument.

 *

 *

 * @example

 * var options = {

 *     target: '#myTargetDiv'

 * };

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

 * @desc Bind form's submit event so that 'myTargetDiv' is updated with the server response

 *       when the form is submitted.

 *

 *

 * @example

 * var options = {

 *     success: function(responseText) {

 *         alert(responseText);

 *     }

 * };

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

 * @desc Bind form's submit event so that server response is alerted after the form is submitted.

 *

 *

 * @example

 * var options = {

 *     beforeSubmit: function(formArray, jqForm) {

 *         if (formArray.length == 0) {

 *             alert('Please enter data.');

 *             return false;

 *         }

 *     }

 * };

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

 * @desc Bind form's submit event so that pre-submit callback is invoked before the form

 *       is submitted.

 *

 *

 * @name   ajaxForm

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

 * @return jQuery

 * @cat    Plugins/Form

 * @type   jQuery

 */

$.fn.ajaxForm = function(options) {

    return this.ajaxFormUnbind().bind('submit.form-plugin',function() {

        $(this).ajaxSubmit(options);

        return false;

    }).each(function() {

        // store options in hash

        $(":submit,input:image", this).bind('click.form-plugin',function(e) {

            var $form = this.form;

            $form.clk = this;

            if (this.type == 'image') {

                if (e.offsetX != undefined) {

                    $form.clk_x = e.offsetX;

                    $form.clk_y = e.offsetY;

                } else if (typeof $.fn.offset == 'function') { // try to use dimensions plugin

                    var offset = $(this).offset();

                    $form.clk_x = e.pageX - offset.left;

                    $form.clk_y = e.pageY - offset.top;

                } else {

                    $form.clk_x = e.pageX - this.offsetLeft;

                    $form.clk_y = e.pageY - this.offsetTop;

                }

            }

            // clear form vars

            setTimeout(function() { $form.clk = $form.clk_x = $form.clk_y = null; }, 10);

        });

    });

};





/**

 * ajaxFormUnbind unbinds the event handlers that were bound by ajaxForm

 *

 * @name   ajaxFormUnbind

 * @return jQuery

 * @cat    Plugins/Form

 * @type   jQuery

 */

$.fn.ajaxFormUnbind = function() {

    this.unbind('submit.form-plugin');

    return this.each(function() {

        $(":submit,input:image", this).unbind('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.

 *

 * 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.

 *

 * @example var data = $("#myForm").formToArray();

 * $.post( "myscript.cgi", data );

 * @desc Collect all the data from a form and submit it to the server.

 *

 * @name formToArray

 * @param semantic true if serialization must maintain strict semantic ordering of elements (slower)

 * @type Array<Object>

 * @cat Plugins/Form

 */

$.fn.formToArray = function(semantic) {

    var a = [];

    if (this.length == 0) return a;



    var form = this[0];

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

    if (!els) return a;

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

        var el = els[i];

        var 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+'.x', value: form.clk_x}, {name: n+'.y', value: form.clk_y});

            continue;

        }



        var v = $.fieldValue(el, true);

        if (v && v.constructor == Array) {

            for(var j=0, jmax=v.length; j < jmax; j++)

                a.push({name: n, value: v[j]});

        }

        else if (v !== null && typeof v != 'undefined')

            a.push({name: n, value: v});

    }



    if (!semantic && form.clk) {

        // input type=='image' are not found in elements array! handle them here

        var inputs = form.getElementsByTagName("input");

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

            var input = inputs[i];

            var n = input.name;

            if(n && !input.disabled && input.type == "image" && form.clk == input)

                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

 *

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

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

 * true for this arg, otherwise pass false (or nothing) to avoid the overhead for

 * this logic (which can be significant for very large forms).

 *

 * @example var data = $("#myForm").formSerialize();

 * $.ajax('POST', "myscript.cgi", data);

 * @desc Collect all the data from a form into a single string

 *

 * @name formSerialize

 * @param semantic true if serialization must maintain strict semantic ordering of elements (slower)

 * @type String

 * @cat Plugins/Form

 */

$.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

 *

 * The successful argument controls whether or not serialization is limited to

 * 'successful' controls (per http://www.w3.org/TR/html4/interact/forms.html#successful-controls).

 * The default value of the successful argument is true.

 *

 * @example var data = $("input").fieldSerialize();

 * @desc Collect the data from all successful input elements into a query string

 *

 * @example var data = $(":radio").fieldSerialize();

 * @desc Collect the data from all successful radio input elements into a query string

 *

 * @example var data = $("#myForm :checkbox").fieldSerialize();

 * @desc Collect the data from all successful checkbox input elements in myForm into a query string

 *

 * @example var data = $("#myForm :checkbox").fieldSerialize(false);

 * @desc Collect the data from all checkbox elements in myForm (even the unchecked ones) into a query string

 *

 * @example var data = $(":input").fieldSerialize();

 * @desc Collect the data from all successful input, select, textarea and button elements into a query string

 *

 * @name fieldSerialize

 * @param successful true if only successful controls should be serialized (default is true)

 * @type String

 * @cat Plugins/Form

 */

$.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 = $(':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 = $(':checkbox').fieldValue();

 *  // if neither checkbox is checked

 *  v === undefined

 *  // if both checkboxes are checked

 *  v == ['B1', 'B2']

 *

 *  var v = $(':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.

 *

 * @example var data = $("#myPasswordElement").fieldValue();

 * alert(data[0]);

 * @desc Alerts the current value of the myPasswordElement element

 *

 * @example var data = $("#myForm :input").fieldValue();

 * @desc Get the value(s) of the form elements in myForm

 *

 * @example var data = $("#myForm :checkbox").fieldValue();

 * @desc Get the value(s) for the successful checkbox element(s) in the jQuery object.

 *

 * @example var data = $("#mySingleSelect").fieldValue();

 * @desc Get the value(s) of the select control

 *

 * @example var data = $(':text').fieldValue();

 * @desc Get the value(s) of the text input or textarea elements

 *

 * @example var data = $("#myMultiSelect").fieldValue();

 * @desc Get the values for the select-multiple control

 *

 * @name fieldValue

 * @param Boolean successful true if only the values for successful controls should be returned (default is true)

 * @type Array<String>

 * @cat Plugins/Form

 */

$.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;

        v.constructor == Array ? $.merge(val, v) : val.push(v);

    }

    return val;

};



/**

 * Returns the value of the field element.

 *

 * 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 the given element is not

 * successful and the successful arg is not false then the returned value will be null.

 *

 * Note: If the successful flag is true (default) but the element is not successful, the return will be null

 * Note: The value returned for a successful select-multiple element will always be an array.

 * Note: If the element has no value the return value will be undefined.

 *

 * @example var data = jQuery.fieldValue($("#myPasswordElement")[0]);

 * @desc Gets the current value of the myPasswordElement element

 *

 * @name fieldValue

 * @param Element el The DOM element for which the value will be returned

 * @param Boolean successful true if value returned must be for a successful controls (default is true)

 * @type String or Array<String> or null or undefined

 * @cat Plugins/Form

 */

$.fieldValue = function(el, successful) {

    var n = el.name, t = el.type, tag = el.tagName.toLowerCase();

    if (typeof 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) {

                // extra pain for IE...

                var v = $.browser.msie && !(op.attributes['value'].specified) ? op.text : op.value;

                if (one) return v;

                a.push(v);

            }

        }

        return a;

    }

    return el.value;

};





/**

 * 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

 *

 * @example $('form').clearForm();

 * @desc Clears all forms on the page.

 *

 * @name clearForm

 * @type jQuery

 * @cat Plugins/Form

 */

$.fn.clearForm = function() {

    return this.each(function() {

        $('input,select,textarea', this).clearFields();

    });

};



/**

 * Clears the selected form elements.  Takes the following actions on the matched elements:

 *  - 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

 *

 * @example $('.myInputs').clearFields();

 * @desc Clears all inputs with class myInputs

 *

 * @name clearFields

 * @type jQuery

 * @cat Plugins/Form

 */

$.fn.clearFields = $.fn.clearInputs = function() {

    return this.each(function() {

        var t = this.type, tag = this.tagName.toLowerCase();

        if (t == 'text' || t == 'password' || tag == 'textarea')

            this.value = '';

        else if (t == 'checkbox' || t == 'radio')

            this.checked = false;

        else if (tag == 'select')

            this.selectedIndex = -1;

    });

};





/**

 * Resets the form data.  Causes all form elements to be reset to their original value.

 *

 * @example $('form').resetForm();

 * @desc Resets all forms on the page.

 *

 * @name resetForm

 * @type jQuery

 * @cat Plugins/Form

 */

$.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.

 *

 * @example $(':radio').enabled(false);

 * @desc Disables all radio buttons

 *

 * @name select

 * @type jQuery

 * @cat Plugins/Form

 */

$.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.

 *

 * @example $(':checkbox').select();

 * @desc Checks all checkboxes

 *

 * @name select

 * @type jQuery

 * @cat Plugins/Form

 */

$.fn.select = 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').select(false);

            }

            this.selected = select;

        }

    });

};



})(jQuery);