hoverer = function() {
	var Elmts = document.getElementById("navi").getElementsByTagName("LI");
	for (var i=0; i<Elmts.length; i++) {
		Elmts[i].onmouseover=function() {
			this.className+=" hoverer";
		}
		Elmts[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" hoverer\\b"), "");
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", hoverer);