hoverFix = function() {
  if(document.getElementById("leftnav"))
  {
    var hoverElems = document.getElementById("leftnav").getElementsByTagName("li");
    for (var i=0; i<hoverElems.length; i++) {
      hoverElems[i].onmouseover=function() {
        this.className+=" hoverfix";
      }
      hoverElems[i].onmouseout=function() {
        this.className=this.className.replace(new RegExp(" hoverfix\\b"), "");
      }
    }
  }

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