.black_overlay{
            display: none;
            position: absolute;
            top: 0%;
            left: 0%;
            width: 200%;
            height: 200%;
            background-color: black;
            z-index:1001;
            -moz-opacity: 0.20;
            opacity:.20;
            filter: alpha(opacity=20);
        }
.white_content{
            display: none;
            position: absolute;
            background-color: white;
            z-index:1002;
 }