#loading{
    background-image: url(book_loading.gif);
    background-repeat: no-repeat;
    background-position: center center;
    position: fixed;
    z-index: 999999;
    bottom: 50px;
    right: 50px;
    width: 120px;
    height: 40px;
    margin-top: -50px;
    mergin-left:-50px;
    opacity: 0.8;
    background-color: #fff;
    border-radius: 200px;
    border-width: 2px;
    border-style: solid;
    border-color: #42a8bc;
    display: block;
    text-align: center;
    padding-top: 80px;
    color:#666;
    display: none;
}