[jQuery] SlideToggle Callback Help

[Chris]

I have this simple slide toggle.


$('.open-post-info').click(function() {
                var id = $(this).attr('id');
                $('.post-info-' + id).slideToggle("medium");
                return false;
});

What I want is when I run the function that after it runs to add CSS
class and when I close/toggle up that the class gets removed.  Help
please.