body {
    background: #808080;
    background-image: url('bg.png');
    background-repeat: no-repeat;    
    margin: 0em;
    padding: 0em;
    font-family: Arial, sans-serif;
}


#horizon {
    text-align: center;
    position: absolute;
    top: 50%;
    left: 0px;
    width: 100%;
    height: 0px;
    overflow: visible;
    visibility: visible;
    display: block;
}

#contentbg {
    margin-left: -252px;
    position: absolute;
    top: -135px;
    left: 50%;
    width: 504px;
    height: 270px;
    visibility: visible;
    z-index: 2;
}