jquery.bonsai.css

.bonsai,
.bonsai li {
	margin: 0;
	padding: 0;
	list-style: none;
    overflow: hidden;
}
.bonsai li {
    position: relative;
    padding-left: 1.3em; /* padding for the thumb */
}
li .thumb {
    margin: -1px 0 0 -1em;  /* negative margin into the padding of the li */
    position: absolute;
    cursor: hand;
}
li.has-children > .thumb:after {
    content: '▸';
}
li.expanded > .thumb:after {
    content: '▾';
}
li.collapsed > ol.bonsai {
	height: 0;
	overflow: hidden;
}