.black_overlay{
  display: none;
  position: absolute;
  top: 0%;
  left: 0%;
  bottom: 0%;
  width: 100%;
  height: 100%;
  background-color: black;
  z-index:1001;
 -moz-opacity: 0.5;
  opacity:.50;
  filter: alpha(opacity=80);
}

.white_content {
  display: none;
  position: absolute;
  top: 10%;
  left: 15%;
  width: 70%;
  /*height: 50%;*/
  height:460px;
  padding: 16px;
  border: 2px solid red;
  background-color: white;
  z-index:1002;
  overflow: auto;
}