.blockingCss{
    position: absolute;
    display: block;
    width: 100%;
    height: 100%;
    overflow: hidden;
    top: 0px;
    left: 0px;
    z-index: 10000;
    background-color: rgba(0,0,0,0.3);
    margin: 0px;
    padding: 0px;
}