isDOM=document.getElementById; //DOM1 browser (MSIE 5+, Netscape 6, Opera 5+)
isOpera=isOpera5=window.opera && isDOM; //Opera 5+
isMSIE=document.all && document.all.item && !isOpera; //Microsoft Internet Explorer 4+
jsHover = function() {
    var hEls = document.getElementById("menu1").getElementsByTagName("LI");
    for (var i=0, len=hEls.length; i<len; i++) {
      hEls[i].onmouseover=function() { this.className+=" jshover"; }
      hEls[i].onmouseout=function() { this.className=this.className.replace(" jshover", ""); }
    }
  }
if (window.attachEvent && navigator.userAgent.indexOf("Opera")==-1) window.attachEvent("onload", jsHover);