dropdown = function() {
	if($("topnav")){
	var sfEls = $("topnav").getElementsByTagName("LI");
		for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
				this.className+=" hover";
			}
			sfEls[i].onmouseout=function() {
				this.className=this.className.replace(new RegExp(" hover\\b"), "");
			}
		}
		
	}

	if($("submenu")){
	var sfEls = $("submenu").getElementsByTagName("LI");
		for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
				this.className+=" hover";
			}
			sfEls[i].onmouseout=function() {
				this.className=this.className.replace(new RegExp(" hover\\b"), "");
			}
		}
		
	}
}

if (window.attachEvent) window.attachEvent("onload", dropdown);