#busy-indicator-inner {
    position: relative;
    top: 50%;
}
#busy-indicator {
    background-color: #000000;
    display: none;
    height: 100%;
    left: 0;
    opacity: 0.25;
    position: absolute;
    text-align: center;
    top: 0;
    width: 100%;
    z-index: 500;
}