(d)
| 218 | |
| 219 | // Toggle children on click. |
| 220 | function click(d) { |
| 221 | if (d.children) { |
| 222 | d._children = d.children; |
| 223 | d.children = null; |
| 224 | } else { |
| 225 | d.children = d._children; |
| 226 | d._children = null; |
| 227 | } |
| 228 | update(d); |
| 229 | } |
| 230 | |
| 231 | function mouseover(d) { |
| 232 |