var LayerMenu;

function MenuMouseOver(Menumm) 
{
   if (LayerMenu != null) {
      LayerMenu.filters.alpha.opacity = 0; 
      LayerMenu.style.display="none";
   }

   LayerMenu = eval(Menumm);
   LayerMenu.style.display=""; 
   LayerMenu.filters.alpha.opacity = 100; 
}