#loadingDiv {
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    text-align: center;
    opacity: 0.7;
    background-color: #fff;
    z-index: 9999;
}

#loadingDivSym {
    top: 50%;
    position: fixed;
    width: 80px;
    height: 80px;
    font-size: 30px;
}