.reveal table tbody td {
  vertical-align : top;
  text-align: center;
}


.reveal table {
  margin: 1 auto;
}


.outer { 
   position: relative; 
   width: 100%; /* for IE 6 */
}

.inner { 
   position: absolute; 
   top: 90px; 
   left: 0; 
   width: 100%; 
}

.topleft{
 position:absolute;
 top:0;
 left:0;
}

.topright{
 position:absolute;
 top:0;
 right:0;
}

.bottomleft{
 position:absolute;
 bottom:0;
 left:0;
}

.bottomright{
 position:absolute;
 bottom:0;
 right:0;
}