function initMenu(){
	var _nav = document.getElementById("nav");
	if (_nav) {
		var nodes = _nav.getElementsByTagName("li");
		for (var i = 0; i < nodes.length; i++) {
			nodes[i].onmouseover = function(){
				if (this.className.indexOf('hover') == -1) 
					this.className += " hover";
			}
			nodes[i].onmouseout = function(){
				this.className = this.className.replace(" hover", "");
			}
		}
	}
}
if (document.all && !window.opera) attachEvent("onload", initMenu);