Gadget-BackToTop.css

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/* ------------------------------------------------------------------------------------------- */
/* -- source: http://www.cnblogs.com/ATree/archive/2011/04/09/JQuery_Mootools_Back-Top.html -- */
/* ------------------------------------------------------------------------------------------- */

.backToTop {
    display: none;
    width: 20px;
    line-height: 1.2;
    padding: 5px 0;
    background-color: #000;
    color: #fff;
    font-size: 14px;
    text-align: center;
    position: fixed;
    _position: absolute;
    right: 2px;
    bottom: 100px;
    _bottom: "auto";
    cursor: pointer;
    opacity: .6;
    filter: Alpha(opacity=60);
}