var preload = (new Image()).src = '/images/menu-over-bg.gif';
menuHover = function() {
	var arrUL = document.getElementById("nav").getElementsByTagName("UL");
	for (var i = 0; i < arrUL.length; i++) {
		arrUL[i].onmouseover = function() { this.style.height = "auto"; }
		arrUL[i].onmouseout = function() { this.style.height = "33px"; }
	}
}
if (window.attachEvent) window.attachEvent("onload", menuHover);