sfHover = function() {
	var idNames = ["mainNav", "nav"];
	
	for(var j =0; j < idNames.length; j++){
	var sfEls = document.getElementById(idNames[j]).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);