function setAnswer(answer_id){
  document.getElementById('answer_id').value = answer_id;
}

function setVote() {
  var answer_id = document.getElementById('answer_id').value;
  var vote_id = document.getElementById('vote_id').value;
  if(answer_id == "") {
    alert('Сначала выбирите ответ.');
    return;
  }
  var req = new JsHttpRequest();
  req.onreadystatechange = function() {
    if (req.readyState == 4) {
      document.getElementById('golos2').innerHTML =  req.responseJS.res;
    }
  }
  // Prepare request object (automatically choose GET or POST).
  req.open(null, '/ajax/vote/', true);
  // Send data to backend.
  req.send( {answer_id:answer_id, vote_id:vote_id} );
}