//from http://htmldog.com/articles/suckerfish/dropdowns/

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-=" sfhover";
		}
	}
}
window.onload=sfHover