Ajaxified tree comes with the following features
1.) Containing the ajax links for the tree items using link_to_remote
2.) Highlighting the selected node of the tree and other custom effects.
3.) Two way syncronization between the tree nodes and the currently displayed item on the web-page.
4.) Supports the tree architecture provided by the acts_as_tree.
5.) Clear and self traversing upto the selected node and all remaining nodes remained closed.
6.) Drag-n-Drop sorting of the tree nodes, including the functionality of even changing the parent of the node.
This tree works very fine in my application and hope it will help u also. Check out the Source Code of the tree.