JJ UTG 6max facing some heat

[MAxx]

MAxx $191, Button $74, SB $99

Poker Stars
No Limit Holdem Ring game
Blinds: $1/$2
6 players
Converter

Pre-flop: (6 players) MAxx is UTG with J[img]/images/graemlins/diamond.gif[/img] J[img]/images/graemlins/heart.gif[/img]
<font color="#cc0000">MAxx raises to $6</font>, 2 folds, <font color="#cc0000">Button raises to $12</font>, <font color="#cc0000">SB raises to $18</font>, BB folds.......

I dont have any reads really, but SB's little raise seems odd, and Buttons stack is Short. What is your standard move?