body {
    margin: 0;
    height: 800px;
}
#mobile {
    width: 100%;
    height: inherit;
}
#screen {
    display: block;
    height: inherit;
}
#page {
    width: 100%;
    height: 100%;
    border-width: 0;
}
#menu {
    background-image: url("images/menu.png");
    background-repeat: no-repeat;
    width: 100%;
    position: fixed;
    height: 82px;
    bottom: 0;
}
#keyboard {
    background-color: blue;
    width: 100%;
    position: relative;
    height: 50px;
}
#keypad {
    background-color: green;
    width: 100%;
    position: relative;
    height: 50px;
}
.lien {
    //background-color: red;
    display: block;
    position: absolute;
    opacity: 0.5;
}