function sfHover() {
	var sfEls = document.getElementById("nav").getElementsByTagName("li");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=mopen;
		sfEls[i].onmouseout=mclose;
	}
}

function mopen(){
	//mcancelclosetime();
	//mclose();
	this.className+=" sfhover";
}

function mclose(){
	this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
}