javascript disable "Show Items from Subfolder"

I have manage to activate by code this ON/OFF option "Show Items from Subfolder", but I couldn't do it from Bridge itself. I only dis it from Photoshop.

Like this:

(...)

to activate it

    bt = new BridgeTalk();
    bt.target = "bridge";
    bt.body = "app.document.chooseMenuItem('FlatView');";
    bt.send(8);
    bt.pump();
// to deactivate it
    bt = new BridgeTalk();
    bt.target = "bridge";
    bt.body = "var hhh=app.document.chooseMenuItem('FlatView'); hhh=false;";
    bt.send(8);
    bt.pump();

(...)