sfHover = function(){
	if(document.getElementById("nav")){
		var elems = document.getElementById("nav").getElementsByTagName("li");
		for(var i=0; i<elems.length; i++) {
			elems[i].onmouseover = function() {
				this.className += " sfhover";
			}
			elems[i].onmouseout = function() {
				this.className = this.className.replace(new RegExp(" sfhover\\b"), "");
			}
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);