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+/*
+ * jQuery form plugin
+ * @requires jQuery v1.0.3
+ *
+ * Dual licensed under the MIT and GPL licenses:
+ *   http://www.opensource.org/licenses/mit-license.php
+ *   http://www.gnu.org/licenses/gpl.html
+ *
+ * Revision: $Id$
+ * Version: 0.9
+ */
+
+/**
+ * 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
+ *
+ *  method:   @deprecated use 'type'
+ *  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)
+ *
+ *  before:   @deprecated use 'beforeSubmit'
+ *  beforeSubmit:  Callback method to be invoked before the form is submitted.
+ *            default value: null
+ *
+ *  after:    @deprecated use 'success'
+ *  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 'after'
+ *                   callback method, if specified, will be passed the responseXML value
+ *      'json':   if dataType == 'json' the server response will be evaluted and passed to
+ *                   the 'after' 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
+ * @see formToArray
+ * @see ajaxForm
+ * @see $.ajax
+ * @author jQuery Community
+ */
+jQuery.fn.ajaxSubmit = function(options) {
+    if (typeof options == 'function')
+        options = { success: options };
+
+    options = jQuery.extend({
+        url:    this.attr('action') || '',
+        method: this.attr('method') || 'GET'
+    }, options || {});
+
+    // remap deprecated options (temporarily)
+    options.success = options.success || options.after;
+    options.beforeSubmit = options.beforeSubmit || options.before;
+    options.type = options.type || options.method;
+
+    var a = this.formToArray(options.semantic);
+
+    // give pre-submit callback an opportunity to abort the submit
+    if (options.beforeSubmit && options.beforeSubmit(a, this, options) === false) return this;
+
+    var q = jQuery.param(a);
+
+    if (options.type.toUpperCase() == 'GET') {
+        // if url already has a '?' then append args after '&'
+        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, status) {
+            jQuery(options.target).attr("innerHTML", data).evalScripts().each(oldSuccess, [data, status]);
+        });
+    }
+    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);
+    };
+
+    jQuery.ajax(options);
+    return this;
+};
+
+/**
+ * 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
+ * @see    ajaxSubmit
+ * @author jQuery Community
+ */
+jQuery.fn.ajaxForm = function(options) {
+    return this.each(function() {
+        jQuery("input:submit,input:image,button:submit", this).click(function(ev) {
+            var $form = this.form;
+            $form.clk = this;
+            if (this.type == 'image') {
+                if (ev.offsetX != undefined) {
+                    $form.clk_x = ev.offsetX;
+                    $form.clk_y = ev.offsetY;
+                } else if (typeof jQuery.fn.offset == 'function') { // try to use dimensions plugin
+                    var offset = jQuery(this).offset();
+                    $form.clk_x = ev.pageX - offset.left;
+                    $form.clk_y = ev.pageY - offset.top;
+                } else {
+                    $form.clk_x = ev.pageX - this.offsetLeft;
+                    $form.clk_y = ev.pageY - this.offsetTop;
+                }
+            }
+            // clear form vars
+            setTimeout(function() {
+                $form.clk = $form.clk_x = $form.clk_y = null;
+                }, 10);
+        })
+    }).submit(function(e) {
+        jQuery(this).ajaxSubmit(options);
+        return false;
+    });
+};
+
+
+/**
+ * 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
+ * @see ajaxForm
+ * @see ajaxSubmit
+ * @author jQuery Community
+ */
+jQuery.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 = jQuery.fieldValue(el, true);
+        if (v === null) continue;
+        if (v.constructor == Array) {
+            for(var j=0, jmax=v.length; j < jmax; j++)
+                a.push({name: n, value: v[j]});
+        }
+        else
+            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
+ * @see formToArray
+ * @author jQuery Community
+ */
+jQuery.fn.formSerialize = function(semantic) {
+    //hand off to jQuery.param for proper encoding
+    return jQuery.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").formSerialize();
+ * @desc Collect the data from all successful input elements into a query string
+ *
+ * @example var data = $(":radio").formSerialize();
+ * @desc Collect the data from all successful radio input elements into a query string
+ *
+ * @example var data = $("#myForm :checkbox").formSerialize();
+ * @desc Collect the data from all successful checkbox input elements in myForm into a query string
+ *
+ * @example var data = $("#myForm :checkbox").formSerialize(false);
+ * @desc Collect the data from all checkbox elements in myForm (even the unchecked ones) into a query string
+ *
+ * @example var data = $(":input").formSerialize();
+ * @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
+ */
+jQuery.fn.fieldSerialize = function(successful) {
+    var a = [];
+    this.each(function() {
+        var n = this.name;
+        if (!n) return;
+        var v = jQuery.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 jQuery.param(a);
+};
+
+
+/**
+ * Returns the value of the field element in the jQuery object.  If there is more than one field element
+ * in the jQuery object the value of the first successful one is returned.
+ *
+ * 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 then
+ * the value of the first field element in the jQuery object is returned.
+ *
+ * Note: If no valid value can be determined the return value will be undifined.
+ *
+ * Note: The fieldValue returned for a select-multiple element or for a checkbox input will
+ *       always be an array if it is not undefined.
+ *
+ *
+ * @example var data = $("#myPasswordElement").formValue();
+ * @desc Gets the current value of the myPasswordElement element
+ *
+ * @example var data = $("#myForm :input").formValue();
+ * @desc Get the value of the first successful control in the jQuery object.
+ *
+ * @example var data = $("#myForm :checkbox").formValue();
+ * @desc Get the array of values for the first set of successful checkbox controls in the jQuery object.
+ *
+ * @example var data = $("#mySingleSelect").formValue();
+ * @desc Get the value of the select control
+ *
+ * @example var data = $("#myMultiSelect").formValue();
+ * @desc Get the array of selected values for the select-multiple control
+ *
+ * @name fieldValue
+ * @param Boolean successful true if value returned must be for a successful controls (default is true)
+ * @type String or Array<String>
+ * @cat Plugins/Form
+ */
+jQuery.fn.fieldValue = function(successful) {
+    var cbVal, cbName;
+
+    // loop until we find a value
+    for (var i=0, max=this.length; i < max; i++) {
+        var el = this[i];
+        var v = jQuery.fieldValue(el, successful);
+        if (v === null || typeof v == 'undefined' || (v.constructor == Array && !v.length))
+            continue;
+
+        // for checkboxes, consider multiple elements, for everything else just return first valid value
+        if (el.type != 'checkbox') return v;
+
+        cbName = cbName || el.name;
+        if (cbName != el.name) // return if we hit a checkbox with a different name
+            return cbVal;
+        cbVal = cbVal || [];
+        cbVal.push(v);
+    }
+    return cbVal;
+};
+
+/**
+ * Returns the value of the field element.
+ *
+ * The successful argument controls whether or not the field element must be 'successful'
+ * (per http://www.w3.org/TR/html4/interact/forms.html#successful-controls).
+ * The default value of the successful argument is true.  If the given element is not
+ * successful and the successful arg is not false then the returned value will be null.
+ *
+ * Note: The fieldValue returned for a select-multiple element will always be an array.
+ *
+ * @example var data = jQuery.fieldValue($("#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>
+ * @cat Plugins/Form
+ */
+jQuery.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 == '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 = jQuery.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
+ * @see resetForm
+ */
+jQuery.fn.clearForm = function() {
+    return this.each(function() {
+        jQuery('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
+ * @see clearForm
+ */
+jQuery.fn.clearFields = jQuery.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
+ * @see clearForm
+ */
+jQuery.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();
+    });
+};