#box {
    width: 0px;
    height: 0px;
    background: #000000;
    border: red dotted 0px;
    text-align: center;
    position: fixed;
    margin-left: -75px;
    margin-top: -75px;
    left: 50%;
    top: 50%;
    z-index: 999999;
    display: block;
    cursor: pointer;
}

#screen {
    position: fixed;
    left: 0;
    top: 0;
    background: #CCCCCC;
    z-index: 999999;
}

#loading {
    position: fixed;
    left: 0;
    top: 0;
    z-index: 100000;
    width: 100%;
    height: 100%;
    display: none;
}

#loading.show {
    display: block;
}

#loading div {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 60px;
    height: 60px;
    margin: -30px 0 0 -30px;
    background: url(../Content/images/loading.gif) 0 0 no-repeat;
}