mm:treecontrol Events

I was just wondering what events are available to the mm:treecontrol? (There doesn't seem to be anything listed here: http://help.adobe.com/en_US/Dreamweaver/10.0_Extending/WS5b3ccc516d4fbf351e63e3d117f53d6718-7ff3.html)

I have tried putting onselect and onclick events on the <mm:treecontrol /> and <mm:treenode /> elements, but they do not seem to trigger anything.

I would like to be able to update another field based on what is selected.

Thanks, Andrew