How to implement tri-state checkbox?

[John Malone]

I would like to implement a tri-state checkbox where the parent node would be unchecked if no children are checked, checked if all childre are checked, and grayed out if some children are checked.  This feature is available in your ASP.NET Ajax TreeView control.  Can you tell me how i would implement the same functionality in teh MVC TreeView?

Jake

[Jordan]

This isn't tri-state but thought it might be useful for you.

http://www.telerik.com/community/forums/aspnet-mvc/treeview/getting-parent-node-unchecked-when-any-child-is-unchecked.aspx
http://www.telerik.com/community/forums/aspnet-mvc/treeview/check-uncheck-child-nodes-when-parent-is-checked-unchecked.aspx