jquery buttonset checkbox refresh

jquery buttonset checkbox refresh

I have buttonset with 4 checkboxes ch1,ch2,ch3,ch4 and submit button for further processing.
My requirement is when i click ch1, all the other 3 should be unchecked.
It happens successfully but visible only after submit button is clicked.
i.e, refresh happens only after submit. how to do refresh in click event itself?

I tried:
  1. $('#span').buttonset();
            $('#chk1').change(function () {
                if($(this).is(":checked")){
                    $('.chkSelect').prop('checked',false);   
                    $('#span').buttonset('refresh');
                }           
             });