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=-800;
  if(topPos < 75) { 
	topPos+=40;
	if (document.layers) document.layers[divId].top = topPos+"px";
	else if (document.all) document.all[divId].style.top = topPos+"px";
	else if (document.getElementById) document.getElementById(divId).style.top = topPos+"px";	
    
	setTimeout("adDown('pop')",2);
  }
}