.window{
  filter: alpha(opacity=80);
  -moz-opacity: 0.80;
  -khtml-opacity: 0.80;
  opacity: 100.80;
  width: 100%;
  height: 100%;
  margin: 0px;
  overflow: hidden;
  z-index: 1;
  position: absolute;
  left: 0;
  top: 0px;
  visibility: hidden;
  background-color: #FFFFFF;
}