.top-banner {
  position: relative;
}
.top-banner .close {
  position: absolute;
  bottom: 0;
  right: 0;
  background-color: #2a2a2a;
  background-image: url("../images/close.gif");
  width: 50px;
  height: 20px;
  opacity: 1;
  filter: alpha(opacity=100);
  -ms-filter: alpha(opacity=100);
}