initPage = function (){
	var nav = document.getElementById("nav");
	if (nav) {
		var nodes = nav.getElementsByTagName("li");
		for (var i = 0, node; node = nodes[i]; i++) {
			if (node.parentNode.id == "nav") {
				node.onmouseover = function () { Element.addClassName(this, "hover"); }
				node.onmouseout = function () { Element.removeClassName(this, 'hover'); }
			}
		}
	}
}

Event.observe(window, 'load', initPage);