div.banner-wrapper {
  margin: 0 auto;
  width: auto;height: auto;
}

div.banner-wrapper div {
  float:left;
  width: 250px;
  margin-right: 5px;
}
div.banner-wrapper div:last-child {
  margin-right: 0;
}

div.banner-wrapper a,
div.banner-wrapper img {
  border: 0;
  height: auto;
}