loadMenu = function() {
	var menuElements = document.getElementById("nav").getElementsByTagName("LI");
	for (var i = 0; i < menuElements.length; i++) {
		menuElements[i].onmouseover = function() {
			this.className += " over";
		}
		menuElements[i].onmouseout = function() {
			this.className = this.className.replace(" over", "");
		}
	}
}

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