body {
    color: #000;
    background-color: #e6e6e6;
    font-family: "Helvetica Neue",Helvetica,Verdana,Arial,sans-serif;
    font-size: 12px;
    min-height: 101%;
    background:url(https://images.cnblogs.com/cnblogs_com/zoumh/1641485/o_2002031442123.jpg);
    height:100%;
    width:100%;
    border:0;
}
#home  {
   opacity:0.7;
}
#toTop {
    background: url(//https://images.cnblogs.com/cnblogs_com/shwee/1218109/o_toTop.bmp) no-repeat 0px top;
    width: 57px;
    height: 57px;
    overflow: hidden;
    position: fixed;
    right: 180px;
    bottom: 20px;
    cursor: pointer;
}
#clockdiv {
    /* left, center, right */
    text-align: center;
}