function writeClass() {
		if (this.className!="active") {
			this.className="sfhover";
		}
	}
		
function clearClass() {
		if (this.className=="sfhover") {
		this.className="";
		}
	}

function sfHover() {
	var sfEls = document.getElementById("nav").getElementsByTagName("LI");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=writeClass;
		sfEls[i].onmouseout=clearClass;
		sfEls[i].onfocus=writeClass;
		sfEls[i].onblur=clearClass;		
		}
}
		
//if (window.attachEvent) window.attachEvent("onload", sfHover);

window.onload=sfHover;