body { position:relative; }
#pop {
   top:30px;
   width:400px;
   margin-left:100px;
   left:50%;
   display:none;
   position:absolute;
   z-index:100000;
}
#popstyle {
   background-color:#fff;
   border:5px solid #79b;
   padding:10px 15px;
   text-align:center;
}
#popdim {
   background-color:#3c4043;
   opacity: 0.8;
   filter:alpha(opacity=80);

   position:absolute;
   left:0;
   top:0;
   width:100%;
   height:100%;
   display:none;
   z-index:99999;
}