#bgDiv {
    display: table;
    top:0px;
    left:0px;
    position: fixed;
    height: 100%;
    width: 100%;
    background : rgba(51,51,51,0.2);
}

#middleDiv {
    display: table-cell;
    vertical-align: middle;
}

#innerDiv {
    border-radius: 25px;
    margin-left: auto;
    margin-right: auto;
    width: 200px;
    height: 200px;
    background: rgba(51,51,51,0.7);
    background-image: url(../resources/loading.gif);
    background-size: 100px 100px;
    background-repeat: no-repeat;
    background-position: center;
}

.imgBackground {
    content:url(../resources/loading.gif);
    display: none;
}