#overlay {
  position: fixed;
  top: 0%;
  left: 0%;
  width: 100%;
  height: 100%;
  background-color: black;
  -moz-opacity: 0.8;
  filter: alpha(opacity=80);
  opacity:.80;
  z-index:1001;
}

#announcement {
  display: none;
  position: absolute;
  width: 900px;
  height: 600px;
  background-color: #000;
  z-index: 1002;
  visibility: visible;
  margin-top: 72px;
  border: 5px solid #999;
  border-radius: 5px;
}

#close {
  position: absolute;
  background-image: url("ca_close.png");
  top: 16px;
  right: 15px;
  cursor: pointer;
  width: 16px;
  height: 15px;
  text-indent: -9999px;
}