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