/**
 * Dropdown menu script3 */
var Menu = Class.create();
Menu.prototype = {

 initialize: function(idOrElement, name, customConfigFunction){
	 this.name = name;
	 this.type = "menu";
	 this.closeDelayTimer = null;
	 this.closingMenuItem = null;
	
	 this.config();
	 if (typeof customConfigFunction == "function") {
	 this.customConfig = customConfigFunction;
	 this.customConfig();
	 }
	 this.rootContainer = new MenuContainer(idOrElement, this);
	 },
	
	 config: function(){
	 this.collapseBorders = true;
	 this.quickCollapse = true;
	 this.closeDelayTime = 500;
 }
}

var MenuContainer = Class.create();
MenuContainer.prototype = {
 initialize: function(idOrElement, parent){
	 this.type = "menuContainer";
	 this.menuItems = [];
	 this.init(idOrElement, parent);
 },

 init: function(idOrElement, parent){
	 this.element = $(idOrElement);
	 this.parent = parent;
	 this.parentMenu = (this.type == "menuContainer") ? ((parent) ? parent.parent : null) : parent;
	 this.root = parent instanceof Menu ? parent : parent.root;
	 this.id = this.element.id;

	 if (this.type == "menuContainer") {
		 if (this.element.hasClassName("dropdown"))
		 this.menuType = "dropdown";
		 else
		 if (this.element.hasClassName("flyout"))
		 this.menuType = "flyout";
		 else
		 if (this.element.hasClassName("horizontal"))
		 this.menuType = "horizontal";
		 else
		 this.menuType = "standard";
		 if (this.menuType == "flyout" || this.menuType == "dropdown") {
		 this.isOpen = false;
		 Element.setStyle(this.element, {
		 position: "absolute",
		 top: 0,
		 left: 0,
		 visibility: "hidden"
		 });
	 }
	 else {
		 this.isOpen = true;
	 }
 }
 else {
	 this.isOpen = this.parentMenu.isOpen;
 }

	 var childNodes = this.element.childNodes;
	 if (childNodes == null)
	 return;
	
	 for (var i = 0; i < childNodes.length; i++) {
	var node = childNodes[i];
	 if (node.nodeType == 1) {
	 if (this.type == "menuContainer") {
	 if (node.tagName.toLowerCase() == "li") {
	 this.menuItems.push(new MenuItem(node, this));
	 }
	 }
	 else {
	 if (node.tagName.toLowerCase() == "ul") {
	 this.subMenu = new MenuContainer(node, this);
	 }
 }
 }
 }
 },

 open: function(){
 if (this.root.closeDelayTimer)
 window.clearTimeout(this.root.closeDelayTimer);
 this.parentMenu.closeAll(this);
 this.isOpen = true;
 if (this.menuType == "dropdown") {
 Element.setStyle(this.element, {
 left: (Position.positionedOffset(this.parent.element)[0]) + "px",
 top: (Position.positionedOffset(this.parent.element)[1] + Element.getHeight(this.parent.element) - 4) + "px"
 });
 this.parent.element.down('a').addClassName('hover');
 }
 else
 if (this.menuType == "flyout") {
 if ((Position.positionedOffset(this.parentMenu.element)[0] + this.parentMenu.element.offsetWidth + this.element.offsetWidth + 20) >
 (window.innerWidth ? window.innerWidth : document.body.offsetWidth)) {
 Element.setStyle(this.element, {
 left: this.element.offsetWidth + "px"
 });
 }
 else {
 Element.setStyle(this.element, {
 left: this.parentMenu.element.offsetWidth + "px"
 });
 };
 }
 Element.setStyle(this.element, {
 visibility: "visible"
 });
 },

 close: function(){
 Element.setStyle(this.element, {
 visibility: "hidden"
 });
 this.parent.element.down('a').removeClassName('hover');
 this.isOpen = false;
 this.closeAll();
 },

 closeAll: function(trigger){
 for (var i = 0; i < this.menuItems.length; ++i) {
 this.menuItems[i].closeItem(trigger);
 }
 }

}


var MenuItem = Class.create();

Object.extend(Object.extend(MenuItem.prototype, MenuContainer.prototype), {
 initialize: function(idOrElement, parent){
 var menuItem = this;
 this.type = "menuItem";
 this.subMenu;
this.init(idOrElement, parent);
 if (this.subMenu) {
 this.element.onmouseover = function(){
 menuItem.subMenu.open();
 }
 }
 else {
 if (this.root.quickCollapse) {
 this.element.onmouseover = function(){
 menuItem.parentMenu.closeAll();
 }
 }
 }
 var linkTag = this.element.getElementsByTagName("A")[0];
if (linkTag) {
 linkTag.onfocus = this.element.onmouseover;
 this.link = linkTag;
 this.text = linkTag.text;
 }
 if (this.subMenu) {
 this.element.onmouseout = function(){
 if (menuItem.root.openDelayTimer)
 window.clearTimeout(menuItem.root.openDelayTimer);
 if (menuItem.root.closeDelayTimer)
 window.clearTimeout(menuItem.root.closeDelayTimer);
 eval(menuItem.root.name + ".closingMenuItem = menuItem");
 menuItem.root.closeDelayTimer = window.setTimeout(menuItem.root.name + ".closingMenuItem.subMenu.close()", menuItem.root.closeDelayTime);
 }
 }
 },

 openItem: function(){
 this.isOpen = true;
 if (this.subMenu) {
 this.subMenu.open();
}
 },

 closeItem: function(trigger){
 this.isOpen = false;
 if (this.subMenu) {
 if (this.subMenu != trigger)
 this.subMenu.close();
 }
 }
});


var menu;


function configMenu(){
 this.closeDelayTime = 300;
}

function initMenu(){
 menu = new Menu('main_nav', 'menu', configMenu);
}


Event.observe(window, 'load', initMenu, false);