.progress-bar {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: white;
    opacity: 0.8;
    z-index: 9999;
    filter: alpha(opacity=80);
    display: none;
}
.progress-bar img{
    position: relative;
    top: 50%;
    left:50%;
    margin: -100px 0 0 -100px;
}