#pop {
   z-index:9999;
   position:absolute;
   text-align:center;
}

#fondogra{
    width: 999px;
    height: 900px;
    background-color: red;
    z-index:2000;
   position:absolute;
    
}
#cerrar {
   float:right;
   margin-right:21px;
   cursor:pointer;
   font:Arial;
   font-size:13px;
   font-weight:bold;
   color:#FFFFFF;
   background-color:#666666;
   width:60px;
   position:relative;
   margin-top:-10px;
   text-align:center;
}