sfHover = function() {

	var sfEls = document.getElementById("nav-primary").getElementsByTagName("LI"); 
	for (var i=0; i<sfEls.length; i++) {

		sfEls[i].onmouseover=function() {

			this.className+=" sfhover"; 
			this.style.zIndex=500; 

		} 
		sfEls[i].onmouseout=function() {

			this.className=this.className.replace(new RegExp(" sfhover\\b"), ""); 
			this.style.zIndex=0; 

		} 

	} 

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