div#content {
    display:none;
    opacity:0;
    height:50px;
    width:80%;
    left:50px;
    position:absolute;
    top:400px;
    background:lightgray;
}
div.menu {
    background:grey;
    display:block;
    width:100px;
    position:absolute;
    left:50px;
    top:100px;
    vertical-align:middle;
    text-align:center;
    padding-top:40px;
    padding-bottom:40px;
}