function plgQuiz_send(quiz_ID, question){

  // get form
  var frm = $('quiz-form__'+quiz_ID).getElementsByTagName('form')[0];
  var numeroElementi = frm.elements.length;

  // prepare an AJAX call
  var ajax = new sack(DOKU_BASE + 'lib/plugins/quiz/getform.php');
  ajax.AjaxFailedAlert = "Sorry, AJAX don't work :(";
  ajax.encodeURIString = false;
  if(ajax.failed) return true;
  
  // prepare data
  plgQuiz_myParam = "";
  for(var i = 0; i < numeroElementi; i++){
    if (frm.elements[i].tagName == "INPUT") {
      if ((frm.elements[i].type == "hidden") || (frm.elements[i].type == "text")) {
         plgQuiz_myParam += ajax.encVar(frm.elements[i].name, frm.elements[i].value) + "&";
      }
      if ((frm.elements[i].type == "checkbox") || (frm.elements[i].type == "radio") ) {
        if (frm.elements[i].checked) { plgQuiz_myParam += ajax.encVar(frm.elements[i].name, frm.elements[i].value) + "&"; }
      }
    }   
  }
  plgQuiz_myParam += ajax.encVar("next_question", question);
  
  ajax.elementObj = $('quiz-div__'+quiz_ID);

  ajax.runAJAX(plgQuiz_myParam);
  return false;
}