/**
 * AjaxSubmit 1.0
 *
 * Submits a form using XHR. Grabs all form-controls
 * with name-attributes and submits to form's action
 * using form's method or custom action/method set in conf
 *
 * @class ajaxSubmit
 * @param {String|Function} foo, CSS-selector to element to be updated with XHR-response or callback function for XHR-call (data is passed to function)
 * @param {Object} conf, custom config-object
 * 
 * Copyright (c) 2008 Andreas Lagerkvist (andreaslagerkvist.com)
 * Released under a GNU General Public License v3 (http://creativecommons.org/licenses/by/3.0/)
 */
jQuery.fn.ajaxSubmit = function(foo, conf) {
        var config = {
                method: false,  // request method (get/post) defaults to form's
                action: false,  // action (url) defaults to form's
                loading: 'Loading...'
        };
        config = jQuery.extend(config, conf);

        var callback = (typeof(foo) === 'string') ? function(data) {jQuery(foo).html(data);} : (typeof(foo) === 'function') ? foo : false;

        return this.each(function() {
                var form = jQuery(this);

                if(form.is('form')) {
                        var method = config.method || form.attr('method');
                        var action = config.action || form.attr('action');
                        var submit = jQuery('input[type="submit"]', form);
                        var data = {};

                        form.submit(function() {
                                jQuery('*[name]', form).each(function() {
                                        var t = jQuery(this);
                                        var val = (t.attr('type') == 'checkbox') ? (t.attr('checked') == true) ? 1 : 0 : t.val();
                                        data[t.attr('name')] = val;
                                });
                                submit.val(config.loading);
                                jQuery[method](action, data, function(data) {
                                        callback(data);
                                });

                                return false;
                        });
                }
        });
};