html, body { width:100%; height:100%; margin:0; padding:0; }
div { margin:0; padding:0; }
#container { width:100%; height:100%; position:relative; }
#menu { position:absolute; top:0; left:0; z-index:3; width:11em; height:100%; }
#main { margin-left:11em; height:100%; }
#menu iframe, #main iframe { width:100%; height:100%; vertical-align: bottom; }