CSS_popup_div

.black_overlay {
  display: none;
  position: absolute;
  top: 0%;
  left: 0%;
  width: 100%;
  height: 100%;
  background-color: black;
  z-index: 1001;
  -moz-opacity: 0.8;
  opacity: .80;
  filter: alpha(opacity=80);
}
.white_content {
  display: none;
  position: absolute;
  top: 25%;
  left: 25%;
  width: 50%;
  height: 50%;
  padding: 16px;
  border: 16px solid orange;
  background-color: white;
  z-index: 1002;
  overflow: auto;
}