I'm developing a mobile website with jam 1.3.2 at the moment. some pages will get a menu of different functions an I use a fixed bottom navbar with icons. those functions could be simply links to other pages but also functions that toggle the display-state of panels or s.t. else with 2 states "on" and "off" and a would like to use the btw-down and the btw-up states.

per default the buttons got the btw-down-class as long as the user taps on it. on release the they lose this class and got the btw-up-class. 

Is there a way to manipulate this  behavior? I tried following but it didn't work:

$button.off("vmouseup")

thank you for tips and

beste heinetz