.preLoading {
    position : absolute;
    top : 0;
    bottom : 0;
    left : 0px;
    right : 0px;
    background : rgba(0,0,0,0.6) !important;
    z-index : 999;
    border : none !important;
    background-size: 40px !important;
    background-repeat: no-repeat !important;
    background-position: center !important;
}