.black_overlay{
    display: none;
    position: fixed;
    top: 0%;
    left: 0%;
    width: 100%;
    height: 100%;
    background-color: white;
    z-index:1001;
    -moz-opacity: 0.8;
    opacity:.80;
    filter: alpha(opacity=80);
}

.white_content {
    display: none;
    padding: 5px;
    position: fixed;
    top: 10%;
    left: 25%;
    width: 50%;
    height: 80%;
    background-color: white;
    border: solid black 10px;
    z-index:1002;
    overflow: auto;
}