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

if (window.attachEvent) window.attachEvent("onload", sfHover);