Using Java in VASSAL

I’ve done some design and additions to a module, working on the Twilight Imperium 3rd Edition: Shards of the Throne module. It has so very many pieces that I was hoping I could use a javascript to display only the pertinent information for each player on their main map, but to have a separate section of the main map that each player can change to display other information that they want to display. Doing so would help reduce the number of items in the man map window so that the map itself could be enlarged to accommodate players requests.