#iframe_header {
    display: block;
    margin:0;
    padding:0;
    overflow: hidden;
    width: 100%;
    height: 1000px;
}

	
#iframe_sidenav {
    display: block;
    margin:0;
    padding:0;
    overflow: hidden;
    width: 220px;
    height: 2000px;
}
#iframe_footer {
    display: block;
    margin:0;
    padding:0;
    overflow: hidden;
    width: 100%;
    height: 760px;
}