.AspectSS {                 /*For the control called "StudentSelector"*/
    display: block;
    position: relative;
    width: 100%;
    height: 0;
    padding: 0 0 125% 0;
    overflow: hidden;
}

.SS {                       /*For the control called "StudentSelector"*/
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
    cursor: pointer;
    background-image: url(/images/userportraits/happy.png);
    background-repeat: no-repeat;
    background-position: center center;
}