#sg_overlay {
  background: transparent url(/images/overlay.png) repeat scroll 0 0;
  display: none;
  height: 100%;
  left: 0;
  position: fixed;
  top: 0;
  width: 100%;
}
#sg_overlay #window {
  display: table-cell;
  vertical-align: middle;
}
#sg_overlay #inner {
  background-color: #FFFFFF;
  margin: 0 auto;
  max-height: 350px;
  overflow: auto;
  padding: 15px;
  width: 250px;
}