html, body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
}

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

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

#GB_window {
  top: 60px;
  left: 0px;
  position: fixed;
  background: #fff;
  border: 5px solid #aaa;
  overflow: auto;
  width: 544px;
  height: 430px;
  text-align:center;
  z-index: 150;
}

#GB_frame {
  border: 0;
  overflow: auto;
  width: 524px;
  height: 430px;
  margin:auto;
}

#GB_caption {
  font-size: 13px;
  color: #666666;
  /*background: #888;*/
  padding: 5px 20px;
  margin: 0;
  text-align: left;
}

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