startList = function ( )
{
  if (document.all&&document.getElementById)
  {
    navRoot = document.getElementById("nav");
    
    for (i=0; i<navRoot.childNodes.length; i++)
    {
      node = navRoot.childNodes[i];
      
      if (node.nodeName == "LI")
      {
        node.onmouseover = function ( )
        {
          this.className+=" over";
        }
        
        node.onmouseout=function()
        {
          this.className=this.className.replace(" over", "");
        }
      }
    }
  }
}

window.onload = startList;