var Menu = new function ()
{
	this.elements = [];
	
	this.register = function (id)
	{
		if (Menu.elements.length == 0) {
			window.onload = Menu.load;
		}

		Menu.elements.push(id);
		

	}

	this.load = function ()
	{
		for (var i = 0; i < Menu.elements.length; i++) {
			if (element = document.getElementById(Menu.elements[i])) {
				if (items = element.getElementsByTagName("li")) {
					for (var i = 0; i < items.length; i++) {
						items[i].onmouseover = Menu.open;
						items[i].onmouseout = Menu.close;
					}
				}
			}
		}
	}
	
	this.open  = function () { this.className = "open"; }
	this.close = function () { this.className = ""; }
}