sfHover = function() {
	var sfEls = document.getElementById("nav").getElementsByTagName("LI");
	var form = document.getElementById("ddlCategory");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" sfhover";
			form.className = "dropDownHidden";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
			form.className = "dropDown";
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);

//thanks much too: http://www.alistapart.com/articles/dropdowns/