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