Przezroczyste tło

#trans {
  height: 230px;
  width: 230px;
  padding: 10px;
  background: transparent url(overlay.png);
  position: relative;
}

/* IE FIX */

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