function SlideLayer(Num)
   {
   var el = document.getElementById(Num);
   if (el.style.display="none")
      {
         el.style.display="block";
         el.style.position="absolute";
      }
   }
         
function SlideLayerHide(Num)
   {
   var el = document.getElementById(Num);
   if (el.style.display="block")
      {
         el.style.display="none";
         el.style.position="absolute";
      }
   }