div.tree-child {
    background: url(../../../images/core/tree.png) no-repeat 11px center
}

div.tree-child-last {
    background: url(../../../images/core/tree-bottom.png) no-repeat 11px center
}

[dir=rtl] div.tree-child,
[dir=rtl] div.tree-child-last {
    background-position: -65px center
}

div.tree-child-horizontal {
    background: url(../../../images/core/tree.png) no-repeat -11px center
}