/*
 * jQuery Form Plugin
 * version: 2.28 (10-MAY-2009)
 * @requires jQuery v1.2.2 or later
 *
 * Examples and documentation 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
 */
;
(function($) {

    /*
     * Usage Note: ----------- Do not use both ajaxSubmit and ajaxForm on the
     * same form. These functions are intended to be exclusive. Use ajaxSubmit
     * if you want to bind your own submit handler to the form. For example,
     * 
     * $(document).ready(function() { $('#myForm').bind('submit', function() {
     * $(this).ajaxSubmit({ target: '#output' }); return false; // <--
     * important! }); });
     * 
     * Use ajaxForm when you want the plugin to manage all the event binding for
     * you. For example,
     * 
     * $(document).ready(function() { $('#myForm').ajaxForm({ target: '#output'
     * }); });
     * 
     * When using ajaxForm, the ajaxSubmit function will be invoked for you at
     * the appropriate time.
     */

    /**
     * ajaxSubmit() provides a mechanism for immediately submitting an HTML form
     * using AJAX.
     */
    $.fn.ajaxSubmit = function(options) {
        // fast fail if nothing selected (http://dev.jquery.com/ticket/2752)
        if (!this.length) {
            log('ajaxSubmit: skipping submit process - no element selected');
            return this;
        }

        if (typeof options == 'function')
            options = {
                success : options
            };

        var url = $.trim(this.attr('action'));
        if (url) {
            // clean url (don't include hash vaue)
            url = (url.match(/^([^#]+)/) || [])[1];
        }
        url = url || window.location.href || '';

        options = $.extend( {
            url : url,
            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) {
            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 a = this.formToArray(options.semantic);
        if (options.data) {
            options.extraData = options.data;
            for ( var n in options.data) {
                if (options.data[n] instanceof Array) {
                    for ( var k in options.data[n])
                        a.push( {
                            name : n,
                            value : options.data[n][k]
                        });
                } else
                    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) {
            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);

        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].apply(options, [ 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;

        var multipart = false;
        // var mp = 'multipart/form-data';
        // multipart = ($form.attr('enctype') == mp || $form.attr('encoding') ==
        // mp);

        // options.iframe allows user to force iframe mode
        if (options.iframe || found || multipart) {
            // 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, 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];

            if ($(':input[name=submit]', form).length) {
                alert('Error: Form elements must not be named "submit".');
                return;
            }

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

            var id = 'jqFormIO' + (new Date().getTime());
            var $io = $('<iframe id="' + id + '" name="' + id
                    + '" src="about:blank" />');
            var io = $io[0];

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

            var xhr = { // mock object
                aborted : 0,
                responseText : null,
                responseXML : null,
                status : 0,
                statusText : 'n/a',
                getAllResponseHeaders : function() {
                },
                getResponseHeader : function() {
                },
                setRequestHeader : function() {
                },
                abort : function() {
                    this.aborted = 1;
                    $io.attr('src', 'about:blank'); // abort op in progress
            }
            };

            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 ]);

            if (s.beforeSend && s.beforeSend(xhr, s) === false) {
                s.global && $.active--;
                return;
            }
            if (xhr.aborted)
                return;

            var cbInvoked = 0;
            var timedOut = 0;

            // add submitting element to data if we know it
            var sub = form.clk;
            if (sub) {
                var n = sub.name;
                if (n && !sub.disabled) {
                    options.extraData = options.extraData || {};
                    options.extraData[n] = sub.value;
                    if (sub.type == "image") {
                        options.extraData[name + '.x'] = form.clk_x;
                        options.extraData[name + '.y'] = form.clk_y;
                    }
                }
            }

            // 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');

                    // update form attrs in IE friendly way
                    form.setAttribute('target', id);
                    if (form.getAttribute('method') != 'POST')
                        form.setAttribute('method', 'POST');
                    if (form.getAttribute('action') != opts.url)
                        form.setAttribute('action', opts.url);

                    // ie borks in some cases when setting encoding
                    if (!options.skipEncodingOverride) {
                        $form.attr( {
                            encoding : 'multipart/form-data',
                            enctype : 'multipart/form-data'
                        });
                    }

                    // 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.setAttribute('action', a);
                        t ? form.setAttribute('target', t) : $form
                                .removeAttr('target');
                        $(extraInputs).remove();
                    }
                }, 10);

            var nullCheckFlag = 0;

            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;

                    if ((doc.body == null || doc.body.innerHTML == '')
                            && !nullCheckFlag) {
                        // in some browsers (cough, Opera 9.2.x) the iframe DOM
                        // is not always traversable when
                        // the onload callback fires, so we give them a 2nd
                        // chance
                        nullCheckFlag = 1;
                        cbInvoked--;
                        setTimeout(cb, 100);
                        return;
                    }

                    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.
     * 
     * 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) {
        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
    $.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.
     */
    $.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,
                        value : $(el).val()
                    });
                    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 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 = $(':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.
     */
    $.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.
     */
    $.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) {
                    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.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
     */
    $.fn.clearForm = function() {
        return this.each(function() {
            $('input,select,textarea', this).clearFields();
        });
    };

    /**
     * Clears the selected form elements.
     */
    $.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.
     */
    $.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;
        }
    })  ;
    };

    // helper fn for console logging
    // set $.fn.ajaxSubmit.debug to true to enable debug logging
    function log() {
        if ($.fn.ajaxSubmit.debug && window.console && window.console.log)
            window.console.log('[jquery.form] ' + Array.prototype.join.call(
                    arguments, ''));
    }
    ;

})(jQuery);