elHover = function() {
	    var elEls = document.getElementById("idMenu").getElementsByTagName("li");
	    for (var i=0; i<elEls.length; i++) {
		    elEls[i].onmouseover=function() {
			    this.className+=" elhover";
		    }
		    elEls[i].onmouseout=function() {
			    this.className=this.className.replace(new RegExp(" elhover\\b"), "");
		    }
	    }
    }
    if (window.attachEvent) window.attachEvent("onload", elHover);