div.box_contents {
    background-color:transparent;
    position: fixed;
    top: 200px;
    width: 100%;
    z-index: 101;
    color: white;
}

div.box_background {
    background-color: #292C29;
    border: 1px solid #8CAABD;
    filter:alpha(opacity=85); /* IE's opacity*/
    opacity: 0.85;
    position: fixed;
    top: 0px;
    left: 0px;
    width: 100%;
    height: 100%;
    z-index: 99;
}