body {
}

#background {

    overflow-y:auto;

    position: fixed;
    /*top: 0;*/
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('/Images/photo-kb.jpg');
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-size: cover;
    opacity: 0.8;
    filter: alpha(opacity=80);
}

.panel {
    opacity : 0.8;
}