Accordion : How to selet the header text of the selected header

Accordion : How to selet the header text of the selected header

I am very new to jQuery, so please forgive what might be a simply question.
 
I have an Accordion working nicely.  In the accordion's Change event function, how can I fetch the selected header's text?  Or perhaps, how do I access ui.newHeader  and/or ui.newContent?

      change:

function (event, ui) {
            ....
      

}

An small sample of code would be very much appeciated!