myhover = function() {
		var hEls = document.getElementById("left_menu1").getElementsByTagName("li");
		for (var i=0, len=hEls.length; i<len; i++) {
			hEls[i].onmouseover=function() { this.className="myhover"; }
			hEls[i].onmouseout=function() { this.className=""; }
		}
		
	}