function hideAd(divId)
{ if (document.layers) document.layers[divId].visibility = 'hide';
  else if (document.all) document.all[divId].style.visibility = 'hidden';
  else if (document.getElementById) document.getElementById(divId).style.visibility = 'hidden';
}

function adDown(divId)
{ state=typeof topPos;
  if(state=='undefined') topPos=-260;
  if(topPos < 75)
  { topPos+=3;
      if (document.layers) document.layers[divId].top = topPos;
    else if (document.all) document.all[divId].style.top = topPos;
    else if (document.getElementById) document.getElementById(divId).style.top = topPos;   
   
    setTimeout("adDown('pop');",25);
    }
}