function initMenu(event,ul){ 
  if(!ul) ul = document.getElementById("menu"); 
  li = ul.getElementsByTagName("li"); 
  for(i=0;i <li.length;i++) 
  { 
      li[i].onmouseover = function(){ 
          try{ 
              this.className='over'; 
              this.getElementsByTagName("ul")[0].style.display="block"; 
          }catch(e){}; 
      } 
      li[i].onmouseout = function(){ 
          try{ 
              this.className='out'; 
              this.getElementsByTagName("ul")[0].style.display="none"; 
          }catch(e){}; 
      } 
  } 
} 
window.onload = initMenu;