77 in the BB vs a LAG on the button

[7ontheline]

Button in this hand has been pretty LAGy - 36/12/2. I took a somewhat different line than I usually do, so I'm looking for what people think of my options. I'll post results and what I actually did a little later.

Party Poker 3/6 Hold'em (9 handed) converter

Preflop: Hero is BB with 7[img]/images/graemlins/spade.gif[/img], 7[img]/images/graemlins/club.gif[/img].
UTG calls, UTG+1 folds, MP1 folds, MP2 folds, MP3 folds, CO folds, <font color="#CC3333">Button <font color="#A500AF">(LAG)</font> raises</font>, SB folds, Hero calls, UTG calls.

Flop: (6.33 SB) J[img]/images/graemlins/spade.gif[/img], 4[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>

What would people do here? I'm not necessarily giving the LAG credit for a J, although I expect he has at least 1 overcard. Do I bet out? Check/fold? Check/call? Checkraise?