.tooltip{
    pointer-events: none;
}
#overlay {
    background: #fff;
    width: 100%;
    height: 100%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 9999;
    vertical-align: middle;
    text-align: center;
    display: table-cell;
}
#overlay img {
    max-height: 100%;
    max-width: 100%;
    width: auto;
    height: auto;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;
}
body.waiting {
    overflow: hidden;
}
td.details-control {
    background: url('/img/details_open.png') no-repeat center center;
    cursor: pointer;
    outline: none;
}
tr.shown td.details-control {
    background: url('/img/details_close.png') no-repeat center center;
}