.treegrid-indent {
    width: 16px;
    height: 16px;
    display: inline-block;
    position: relative;
}

.treegrid-expander {
    width: 16px;
    height: 16px;
    display: inline-block;
    position: relative;
    cursor: pointer;
}

.treegrid-expander-expanded {
    background-image: url(/image/collapse.png);
}

.treegrid-expander-collapsed {
    background-image: url(/image/expand.png);
}