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';
      }
   }