hover = function() {
	var menu = document.getElementById("lvl0").getElementsByTagName("li");
	for (var i=0; i<menu.length; i++) {
		menu[i].onmouseover=function() {
			this.className+=" hover";
		}
		menu[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" hover\\b"), "");
		}							
	}
	menu = '';
}

if (window.attachEvent){
	window.attachEvent("onload", hover);
}