We have an application written with Struts 18.104.22.168 that uses the dojo plug-in for the tabbed panels. We need to add functionality to this application that provides tree support. So basically, the app has a top level menu, clicking on each item will display a set of tabs for that item. Some tabs will need to display a tree control where clicking on items in the tree will change the contents of a div to the right of the tree. I also need the tree to maintain state, so if I leave the screen and come back the tree is expanded to the same state with the same item selected.