.simplifyLoading {
    background: url('http://www.ajaxload.info/images/exemples/24.gif') center center no-repeat white;
    position: absolute;
    height: 100%;
    width: 100%;
    top: 0;
    left: 0;
    border-radius: 10px;
    zoom: 1;
    filter: alpha(opacity=50);
    opacity: 0.5;
    z-index: 100;
}