function centra()    {
   if (document.layers)
      {
      document.layers['sponsor'].width=380;
      document.layers['sponsor'].pageX =(window.innerWidth/2)-(document.layers['sponsor'].width/2);
      document.layers['sponsor'].height=380;
      document.layers['sponsor'].pageY =(window.innerHeight/2)-(document.layers['sponsor'].height/2);

      }
   else
      if (document.all)
         {
         document.all.sponsor.width=380;
         document.all.sponsor.style.posLeft =(document.body.clientWidth/2)-(document.all.sponsor.width/2);
         document.all.sponsor.height=380;
         document.all.sponsor.style.posTop =(document.body.clientHeight/2)-(document.all.sponsor.height/2);

         }
      else
	     if (document.getElementById )
            {
            document.getElementById('sponsor').width=380;
            document.getElementById('sponsor').style.left =(window.innerWidth/2)-(document.getElementById('sponsor').width/2);
            document.getElementById('sponsor').height=380;
            document.getElementById('sponsor').style.top =(window.innerHeight/2)-(document.getElementById('sponsor').height/2);

            }
}