sfHover = function() {
	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(new RegExp(" sfhover\\b"), "");
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);
  
<!-- the next 2 functions are for the image rollovers -->
var selected = "x";

function imgAct(imgName) {
	if (document.images) {
		document[imgName].src = eval(imgName + "on.src");
	}
}
function imgInact(imgName) {
	if (document.images) {
         if (imgName != selected)
	{
		document[imgName].src = eval(imgName + "off.src");
		
	}
	}
}