I have a couple of checkboxes and a status box that tells you if at least 1 of the checkboxes are checked.

I also have a check All/None checkbox which works in toggling the checkboxes but it is not triggering the change event that is assigned to each of the checkboxes so the status never gets updated if the check All/None checkbox is used. 

Here is my implementation:

<http://jsfiddle.net/axl163/Fckvd/1/>