#backTop {
    width: 35px;
    height: 35px;
    padding: 10px;
    border-radius: 4px;
    text-indent: -9999px;
    cursor: pointer;
    z-index: 999999999;
    display: none;
    box-sizing: content-box
}

#backTop.white {
    background: url(/phplib/scripts/jquery-plugins/backtotop/img/uparr-48-b.png) no-repeat center center rgba(255, 255, 255, .8);
    border: 1px solid #ccc
}

#backTop.black {
    background: url(/phplib/scripts/jquery-plugins/backtotop/img/uparr-48-w.png) no-repeat center center rgba(0, 0, 0, .8);
    border: 1px solid #ccc
}

#backTop.red {
    background: url(/phplib/scripts/jquery-plugins/backtotop/img/uparr-48-w.png) no-repeat center center rgba(217, 97, 81, .9);
    border: 1px solid #fff
}

#backTop.green {
    background: url(/phplib/scripts/jquery-plugins/backtotop/img/uparr-48-b.png) no-repeat center center rgba(81, 217, 187, .9);
    border: 1px solid #fff
}

@media screen and (max-width:767px) {
    #backTop {
        width: 20px;
        height: 20px
    }
}