Jquery checkbox Groups (Select one checkbox from a group)

$(document).ready(function() {

          $(".selector input.testcheck").click(function () {
                var test = $(this).val();
             
              if ($(this).attr("checked")) {
                  $(".selector input.testcheck[value!=" + test + "]").attr('checked', false);
                  $(".selector input.testcheck[value=" + test + "]").attr('checked', true);
               }
                else {
                    $(this).removeAttr("checked")
                }
            });

 });
----------------------------------
<div class="selector">
<input type="checkbox" name="cbxtest" value="1" class="testcheck"/>YES                         
<input type="checkbox" name="cbxtest" value="2" class="testcheck"/>NO
  </div>