img
{
  position:absolute;
  top:50%;
  left:50%;
  width:699px;
  height:509px;
  margin-top:-254px; /* Half the height */
  margin-left:-349px; /* Half the width */
  padding:20px;
  border:1px dotted #666666;
  box-shadow: 10px 10px 10px #999999;
}