Lil Feller-

if you're going along with Eric's ideas, you're asking the wrong question. I think you should phrase it as:
Holding JJ when you've been checkraised on the flop and led into on the turn, what is your distribution of folding/calling/raising?

Absent a read, I'm in the {5,80,15} mood, myself on the turn, and probably {20,80,0} (essentially) on the river