button is unknown.
Party Poker 10.00/20.00 Hold'em <font color="#0000FF">(6 handed)</font>
link
Preflop: Hero is BB with 2[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/club.gif[/img].
<font color="#666666">
3 folds</font>, Button calls, SB completes, Hero checks.
Flop: (3.00 SB) J[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, <font color="#CC3333">Button raises</font>, SB folds, Hero calls.
Turn: (3.50 BB) 5[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, Button checks.
River: (3.50 BB) T[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero???
Obviously, the best action in this situation is very player dependent, but what is your default play against an unknown?