menu doesnt close on click outside of menu in IE and FF

Hi, when using the 'click' action to open and close the menu.
when menu is open and clicking outside of it - in chrome it closes ok.
in Internet Explorer and Firefox it doesn't close.
i tried to see the problem in
/modules/mod_jux_megamenu/assets/js/script.js
(under if (this.options.action == 'click' /* && li.childcontent*/ ) {)

but couldn't find a way to do this.

please help with solving this issue.
thanks

it seems that un-commenting lines 554-565 solves the problem. why is it commented out ?