ajax에서 만든 radio 버튼의 값을 자바스크립트로 받는 방법 채택완료

<script>
   $('input[id=kk_0]').change(function() {  
   $('#titleTbody').html('');
   var qa_id = $(this).data("qa_id");
   
   $.ajax({
      url: "title.php",
      type: "POST",
      data: {
         "qa_id": qa_id
      },
      dataType: "json",
      async: false,
      cache: false,
      success: function(data, textStatus) {
         class_id=data.Competition;
         for(i=0; i<class_id.length;i++){
            if(i%2==0){
               $('#titleTbody').append('<tr><th scope="row" class="h">'+class_id[i]+'</th><th class="h radio_r"><input type="radio" name="check" value="'+class_id[i]+'" id="tt_0" data-ta_id="'+class_id[i]+'" onclick="aa"/></th></tr>"');
            }else{
               $('#titleTbody').append('<tr><th scope="row" class="even">'+class_id[i]+'</th><th class="even radio_r"><input type="radio" name="check" value="'+class_id[i]+'" id="tt_0" data-ta_id="'+class_id[i]+'" onclick="aa"/></th></tr>"');
            } 
         }
      }
   });
   }); 
</script>

function aa(){
   alert(document.getElementById("tt_0").value);
}