.UIBackTopTopControl {
        background: rgba(0, 0, 0, 0) url("images/upsquare.png") no-repeat scroll center center;
        background-size:100%;
        bottom: 50px;
        height: 50px;
        position: fixed;
        right: 10px;
        width: 50px;
        z-index: 10;
        cursor: pointer;
}
@media only screen and (max-width: 768px){
        .UIBackTopTopControl {
                display: none;
        }
}