.backToTop {
     border: 1px dashed;
     display: none;
     width: 18px;
     line-height: 1.2;
     padding: 5px 0;
     background-color: #fff;
     color: #000;
     font-size: 12px;
     text-align: center;
     position: fixed;
     _position: absolute;
     right: 10px;
     bottom: 100px;
     _bottom: "auto";
     cursor: pointer;
     opacity: .6;
     filter: Alpha(opacity=60);
}