html, body {
        height:100%;
        width:100%
        padding:0;
        overflow:hidden;
}
        
#content_container {
        height:90%;
        padding-top:100px;
        overflow:auto;
}

#footer {
        z-index:1;
        width:500px;
        position:absolute;
}

#header {
        z-index:1;
        position:absolute;
        width:500px;
}