#slideshow {
  position: relative;
  width:  540px;
  height: 480px;
  text-align:center;
}

#slideshow div {
  position:absolute;
  top:0;
  left:0;
  z-index:8;
  opacity:0.0;
  width:  540px;
  height: 480px;
  background:#000000;
}

#slideshow div.active {
  z-index:10;
  opacity:1.0;
}

#slideshow div.last-active {
  z-index: 9;
}