ieHover = function() {
var LIs = document.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", ieHover);