#pop { 
   z-index:1000; 
   position:absolute; 
   border: 1px solid #333333; 
   text-align:center; 
   background:#000000; 

} 
#cerrar { 
   float:right; 
   margin-right:30px; 
   cursor:pointer; 
   font:Verdana, Arial, Helvetica, sans-serif; 
   font-size:12px; 
   font-weight:bold; 
   color:#FFFFFF; 
   background-color:#666666; 
   width:50px; 
   margin-top:0px; 
   text-align:center; 
}