addHover = function() {
  if (document.all&&document.getElementById) {
    var elems = document.getElementById("spe-nav").getElementsByTagName("LI");
    for (var i=0; i<elems.length; i++) {
      elems[i].onmouseover=function() {
        this.className+=" over";
        this.className=this.className.replace("nav-parent", "nav-parent-over");
      }
      elems[i].onmouseout=function() {
        this.className=this.className.replace(" over", "");
        this.className=this.className.replace("nav-parent-over", "nav-parent");
      }
    }
  }
}