Currently there are at least two scripts available for this game because the format was changed just recently.
Old format:
http://aluigi.org/papers/bms/others/jx3online.bms
New format:
http://aluigi.org/papers/bms/others/jx3online_new.bms
The two formats are completely different so wasn't possible to do an "all-in-one" script as I usually do.