Bootstrap Multiselect fire event on onfocus

So I am using Bootstrap's multiselect plugin and I am trying to figure out if it's possible to fire an event AFTER I check the desired boxes instead of the event firing when checking a box.

At the moment it's like this:

1 ) click for focus on dropdown multiselect menu

2 ) check boxes ( event fires on each check )

3 ) close and onfocus dropdown

So what I want is this;

1 ) click for focus on dropdown multiselect menu

2 ) check desired boxes

3 ) close and onfocus dropdown

4 ) Event fires

Does anyone have any idea?