Updating one updatepanle data from other updatepanel

I have a september ctp atlas dll. We have one updatepanel with timer which fires every 5 seconds & get application variable data from server.In second updatepanel we have a treeview which we want to update only if value in application variable changes.If we put timer in treeview updatepanel then treeview refreshes with images,nodes which we do not want.Can we add nodes in treeview from another updatepanel.Unfortunately, the treeview is not yet supported (as well as some other databound controls that use templates)...There are some hacks you can try in the meantime...for instance the gridview when template is not supposed to be supported but I have managed to get it to work by using a combinations of controls...another good post to read is this...