sfHover = function() {
	if (document.getElementById && document.getElementsByTagName) {
		var sfEls = document.getElementById("topnav").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"), "");
			}
		}
		
		var sfSubEls = document.getElementById("submenu").getElementsByTagName("LI");
		for (var i=0; i<sfSubEls.length; i++) {
			sfSubEls[i].onmouseover=function() {
				this.className+=" sfhover";
			}
			sfSubEls[i].onmouseout=function() {
				this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
			}
		}
	}
}

if (window.attachEvent) {
	window.attachEvent("onload", sfHover);
} else {
	if (document.all && document.getElementById) { 
		addLoadEvent(sfHover);
	}
}

var addLoadEvent = function(f) {
    var old = window.onload;
    window.onload = function() {
        if (old) { old(); }
        f();
    };
};