function startMenu() {
	if (document.getElementById) {
		nav = document.getElementById('menu');
		for (i=0; i<nav.childNodes.length; i++) {
			node = nav.childNodes[i];
			if (node.nodeName == 'LI') {
				node.onmouseover = function() {
					this.className = 'over';
      				 }
      				 node.onmouseout = function() {
					this.className = '';
				}
			}
		}
	}
}