.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);
}
/* 设置签名格式 */
#MySignature {
    display: none;
    background-color: #B2E866;
    border-radius: 10px;
    box-shadow: 1px 1px 1px #6B6B6B;
    padding: 10px;
    line-height: 1.5;
    text-shadow: 1px 1px 1px #FFF;
    font-size: 16px;
    font-family: 'Microsoft Yahei';
}
#back-to-top {
    background-color: #00CD00;
    bottom: 0;
    box-shadow: 0 0 6px #00CD00;
    color: #444444;
    padding: 10px 10px;
    position: fixed;
    right: 50px;
    cursor: pointer;
}