#GB_overlay {
  background-image: url(../images/overlay.png); 
  position: absolute;
  margin: auto;
  top: 0;
  left: 0;
  z-index: 100;
  width:  100%;
  height: 120%;
}

* html #GB_overlay {
  background-color: #000;
  background-color: transparent;
  background-image: url(blank.gif);
  filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(src="overlay.png", sizingMethod="scale");
}

#GB_window {
  position: absolute;
  top: 10%;
  left: 0px;
  background: #fff;
  border: 1px solid #aaa;
  overflow: auto;
  width: 600px;
  height: 400px;
  z-index: 150;
  -moz-border-radius:12px;
  -webkit-border-radius:12px;
}

#GB_frame {
  border: 0;
  overflow: auto;
  width: 100%;
  height: 378px;
}

#GB_caption {
  font: 12px bold helvetica, verdana, sans-serif;
  color: #333;
  padding: 8px 5px 3px 12px;
  margin: 0;
  text-align: left;
}

#GB_window img {
  position: absolute;
  top: 2px;
  right: 5px;
  cursor: pointer;
  cursor: hand;
}