.b-ext div.tree-child {background: url("/ext/core/misc/tree.png") no-repeat 11px center;}
.b-ext div.tree-child-last {background: url("/ext/core/misc/tree-bottom.png") no-repeat 11px center;}
.b-ext [dir="rtl"] div.tree-child, .b-ext [dir="rtl"] div.tree-child-last {background-position: -65px center;}
.b-ext div.tree-child-horizontal {background: url("/ext/core/misc/tree.png") no-repeat -11px center;}