over = function(){
	var i, sfEls = document.getElementById('nav').getElementsByTagName('LI');
	for (i=0; i<sfEls.length; i++){
		addEvent(sfEls[i], 'mouseover', function(){
			this.className+=' over';
		});
		addEvent(sfEls[i], 'mouseout', function(){
			this.className=this.className.replace(new RegExp('\\bover\\b'), '');
		});
	}
}
function addEvent(obj, type, fn){
	if (obj.addEventListener)
		obj.addEventListener(type, fn, false);
	else if (obj.attachEvent){
		obj["e"+type+fn] = fn;
		obj[type+fn] = function(){obj["e"+type+fn](window.event);}
		obj.attachEvent("on"+type, obj[type+fn]);
	}
}
var focusMe = false;
addEvent(window, 'load', over);