.b-top__scroll-top {
    position: absolute;
    top: -3px;
    right: -51px;
    width: 29px;
    height: 29px;
    background: url('scroll-top.png') no-repeat;
}

.b-top__scroll-top_style_big-top-position {
    top: 36px;
}

.b-data__section .b-top__scroll-top {
    top: 0;
    right: -48px;
}

.b-top__scroll-top:hover {
    -moz-opacity: .7;
    -khtml-opacity: .7;
    opacity: .7;
    filter: alpha(opacity=70);
}

.b-top__scroll-top:active {
    -moz-opacity: .9;
    -khtml-opacity: .9;
    opacity: .9;
    filter: alpha(opacity=90);
}