initHover = function() {
if (document.all && document.getElementById) {
	navRoot = document.getElementById("MainNav");
	for (i=0; i < navRoot.childNodes.length; i++) {
		node = navRoot.childNodes[i];
		if (node.nodeName=="LI") {
			node.onmouseover = function() {
				this.className += " hover";
			}
		
			node.onmouseout = function() {
				this.className = this.className.replace(" hover", "");
			}
		}
	}
}
}

window.onload = initHover;