var menus = ["menu1"];

var liSelected = '';
function simple_munu () {
	for(i = 0; i < menus.length; i ++){
		var menuUL = document.getElementById(menus[i]).getElementsByTagName("ul");
		for (u = 0; u < menuUL.length; u ++){
			menuUL[u].parentNode.onmouseover = function(){
				liSelected = this.getElementsByTagName("ul")[0].parentNode.className;
				this.getElementsByTagName("ul")[0].parentNode.className = 'selected';
				this.getElementsByTagName("ul")[0].style.visibility = "visible";
			}
			menuUL[u].parentNode.onmouseout = function(){
				this.getElementsByTagName("ul")[0].parentNode.className = liSelected;
				this.getElementsByTagName("ul")[0].style.visibility = "hidden";
			}		
		}
	}
}
if (window.addEventListener) {
	window.addEventListener("load", simple_munu, false);
}
else if (window.attachEvent) {
	window.attachEvent("onload", simple_munu);
}