// Fonction de gestion des quizs
function send_response( radio ) {
  var radio_button = 'question_'+index_radio;
  var myForm = document.getElementById( 'fm_quiz' );
  var submit_button = document.getElementById( 'envoyer_validez' );
  submit_button.style.display = 'block';

  for (i = 0; i < myForm[radio_button].length; i++) {
    myForm[radio_button][i].disabled = true;
  }

  document.getElementById( 'votre_reponse_'+index_radio ).innerHTML = (radio.value == id_br)?"Верно!":"Неверно!";
  document.getElementById( 'reponse_'+index_radio ).style.display = "block";
  document.getElementById( 'reponse_question_'+index_radio ).value = radio.value;
}