div.ad_728_90 {
  width: 728px;
  height: 90px;
}

div.ad_160_600 {
  width: 160px;
  height: 600px;
}

div.ad_160_any {
  width: 160px;
}

.ad_728_90 img, .ad_160_600 img, .ad_160_any img {
  border-width: 0px;
}