window.onload = function(){
		if(document.getElementById('nav')) navHover();
	}

	function navHover() {
		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("sfhover", "");
			}
		}
	}