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 (document.all&&document.getElementById) window.onload=sfHover;
<!-- if (document.all&&document.getElementById) window.onload=sfHover; -->
<!-- if (window.attachEvent) window.attachEvent("onload", sfHover); -->
var range = 6;
function genRandom() {
	if (Math.random)
		imgRef = Math.round(Math.random() * (range-1));
	else {
		var now = new Date();
		imgRef = (now.getTime() / 1000) % range;
	}
	document.writeln('<style type="text/css" media="screen"> span#ban { background-image: url(images/ba/'+imgRef+'.jpg); }</style>');
}