.back-to-top {
    display: none;
    position: fixed;
    width: 100px;
    height: 40px;
    overflow:hidden;
    _position:absolute;
}

.back-to-top a {
    position:absolute;
    left: 0;
    top: 40px;
}
* html{
    background-image:url(about:blank);
    background-attachment:fixed;
}