/**
 * Magento
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Academic Free License (AFL 3.0)
 * that is bundled with this package in the file LICENSE_AFL.txt.
 * It is also available through the world-wide-web at this URL:
 * http://opensource.org/licenses/afl-3.0.php
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@magentocommerce.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade Magento to newer
 * versions in the future. If you wish to customize Magento for your
 * needs please refer to http://www.magentocommerce.com for more information.
 *
 * @category    Varien
 * @package     js
 * @copyright   Copyright (c) 2010 Magento Inc. (http://www.magentocommerce.com)
 * @license     http://opensource.org/licenses/afl-3.0.php  Academic Free License (AFL 3.0)
 */

/**
 * @classDescription simple Navigation with replacing old handlers
 * @param {String}
 *            id id of ul element with navigation lists
 * @param {Object}
 *            settings object with settings
 */
var mainNav = function(){

	var main = {
		obj_nav: $(arguments[0]) || $("nav"),

		settings: {
			show_delay: 0,
			hide_delay: 0,
			_ie6: /MSIE 6.+Win/.test(navigator.userAgent),
			_ie7: /MSIE 7.+Win/.test(navigator.userAgent)
		},

		init: function(obj,level){
			obj.lists = obj.childElements();
			obj.lists.each(function(el,ind){
				main.handlNavElement(el);
				if((main.settings._ie6 || main.settings._ie7) && level){
					main.ieFixZIndex(el,ind,obj.lists.size());
				}
			});
			if(main.settings._ie6 && !level){
				document.execCommand("BackgroundImageCache",false,true);
			}
		},

		handlNavElement: function(list){
			if(list !== undefined){
				list.onmouseover = function(){
					main.fireNavEvent(this,true);
				};
				list.onmouseout = function(){
					main.fireNavEvent(this,false);
				};
				if(list.down("ul")){
					main.init(list.down("ul"),true);
				}
			}
		},

		ieFixZIndex: function(el,i,l){
			if(el.tagName.toString().toLowerCase().indexOf("iframe") == -1){
				el.style.zIndex = l - i;
			}else{
				el.onmouseover = "null";
				el.onmouseout = "null";
			}
		},

		fireNavEvent: function(elm,ev){
			if(ev){
				elm.addClassName("over");
				elm.down("a").addClassName("over");
				if(elm.childElements()[1]){
					main.show(elm.childElements()[1]);
				}
			}else{
				elm.removeClassName("over");
				elm.down("a").removeClassName("over");
				if(elm.childElements()[1]){
					main.hide(elm.childElements()[1]);
				}
			}
		},

		show: function(sub_elm){
			if(sub_elm.hide_time_id){
				clearTimeout(sub_elm.hide_time_id);
			}
			sub_elm.show_time_id = setTimeout(function(){
				if(!sub_elm.hasClassName("shown-sub")){
					sub_elm.addClassName("shown-sub");
				}
			},main.settings.show_delay);
		},

		hide: function(sub_elm){
			if(sub_elm.show_time_id){
				clearTimeout(sub_elm.show_time_id);
			}
			sub_elm.hide_time_id = setTimeout(function(){
				if(sub_elm.hasClassName("shown-sub")){
					sub_elm.removeClassName("shown-sub");
				}
			},main.settings.hide_delay);
		}

	};
	if(arguments[1]){
		main.settings = Object.extend(main.settings,arguments[1]);
	}
	if(main.obj_nav){
		main.init(main.obj_nav,false);
	}
};

document.observe("dom:loaded",function(){
	// run navigation without delays and with default id="#nav"
	// mainNav();

	// run navigation with delays
	mainNav("nav",{
		"show_delay": "0",
		"hide_delay": "0"
	});
});