div#slideShow {
  display: block;
  width: 800px;
  height: 300px;
  overflow: hidden;
  position: absolute;
  margin-top: 10px;
}

div#slideShow > img {
  display: block;
  position: absolute;
  top: 0;
  width: 800px;
  height: 300px;
  opacity: 1;
}