function hoverIE() {
    var navRoot = document.getElementById("nav").firstChild;
    do {
      if(navRoot.firstChild) {  // A (SPAN)
        if(navRoot.firstChild.nextSibling) {  // #text
          if(navRoot.firstChild.nextSibling.nextSibling) {  // UL ?
            navRoot.onmouseover=einblenden; navRoot.onmouseout=ausblenden;
          }
        }
      }
      navRoot = navRoot.nextSibling;
    }
    while(navRoot);
  }
  function einblenden() {
    this.firstChild.nextSibling.nextSibling.style.display = "block";
    this.firstChild.nextSibling.nextSibling.style.backgroundColor = "none";
  }
  function ausblenden() {
    this.firstChild.nextSibling.nextSibling.style.display = "none";
  }
window.onload=hoverIE;