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