#menu, #contenu {padding:1px 0;}
#main {margin:0px;display:table;width:100%;height: auto;}
#menu {display:table-cell;width:250px;}
#contenu {display:table-cell;}

.menu-container {top: 0; left: 0; padding-top: 100%; }
.menu-iframe { position: absolute; top: 0; left: 0; width: 250px; height: 600px; border: 0; }
.main-iframe { position: absolute; top: 0; left: 0;  width: 100%;  height: 600px;  border: 0; }
.main-container {position: relative;overflow: hidden; width: 100%;padding-top: 100%; }