javascript - Keeping Pop-ups in viewport -

I am using a plugin to display menu pop-ups, but the problem occurs when the menu item It is large, it overflows with the viewport.

How can I always adjust the status of the pop-up menu to keep it in the viewport?

I have helped to bend someone and I think that this is your code only with HTML The best way to reformat can be & amp; CSS changes Otherwise, I suppose you want to resort to javascript / jQuery.