function initMenu()
{
     var nodes = document.getElementsByTagName("li");
     for (var i=0; i<nodes.length; i++)
     {
          nodes[i].onmouseover = function()
          {
               this.className += " hover";
          }
          nodes[i].onmouseout = function()
          {
               this.className = this.className.replace(" hover", "");
          }
     }
}
if (document.all && !window.opera) attachEvent("onload", initMenu);