Should I fold JJ?

[shakingspear]

Haven't played long on the table, but have noticed button is a bit passive.

Party Poker 1/2 Hold'em (10 handed) converter (http://www.selachian.com/tools/bisonconverter/hhconverter.cgi)

Preflop: Hero is SB with J/images/graemlins/club.gif, J/images/graemlins/heart.gif.
UTG calls, <font color="#666666">5 folds</font>, CO calls, Button calls, <font color="#CC3333">Hero raises</font>, BB calls, UTG calls, CO calls, Button calls.

Flop: (10 SB) 4/images/graemlins/diamond.gif, 8/images/graemlins/heart.gif, 7/images/graemlins/spade.gif <font color="#0000FF">(5 players)</font>
<font color="#CC3333">Hero bets</font>, BB folds, UTG folds, CO calls, <font color="#CC3333">Button raises</font>, <font color="#CC3333">Hero 3-bets</font>, CO folds, <font color="#CC3333">Button caps</font>, Hero calls.

Turn: (9.50 BB) 6/images/graemlins/spade.gif <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">Button bets</font>, Hero calls.

River: (11.50 BB) 2/images/graemlins/heart.gif <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">Button bets</font>, Hero calls.

Final Pot: 13.50 BB

[Firefly]

I think you can fold the turn safely here. He capped the flop and there is now a 4-straight on the board. If he is passive he isn't doing this with A8 or K7. Calling the flop was fine but i'd fold the turn Unimproved. Looks like a set or straight.

[shakingspear]

Yeah, I guess that's what I was thinking. I just wasn't sure if I should bet on the turn instead of checking.

[parappa]

Perhaps, but couldn't button also have 2-pair? I don't think it's particularly important that there's now a 4-straight on the board; if he's got a straight, he's supposed to already have the 6. We have a lot of outs against something like 87 (4 5s for a chop, 3 4's, 3 6's and 2 J's for a win). I'm thinking it might be a call as played, though I think I would've bet/folded the turn.

Edit: my outs calculation was a mess. I took another shot.