The short story:

We have a screen that presents a list of data with nested subgroups. We've implemented some JavaScript that is making this happen but a new requirement has us stumped. After a user has opened some of the branches of the tree of data - they want the choices they've made to be sticky so that when they return after adding more data, reviewing data details or whatever - they see the 'tree' just as they left it.

What I'm hoping to find:

We are building in a .NET framework but have the option to rebuild in Java. We are hoping that someone has a direction they can point us in regards to some 'canned code' that we can implement or some feedback about our existing code that might make this work.

You scan see a mockup of our current effort at this link. (http://www.robfloyd.com/bi/)