jQuery see if any or no checkboxes are selected

Question

I know how to see if an individual checkbox is selected or not.

But Im having trouble with the following - given a form id I need to see if any of the check

Answer 1

This is what I used for checking if any checkboxes in a list of checkboxes had changed:

$('input[type="checkbox"]').change(function(){ 

        var itemName = $('select option:selected').text();  

         //Do something.

});