jQuery에서 10초마다 AJAX로 피드백 표시를 업데이트하는 방법은 무엇입니까?

<code class="javascript">$(document).ready(function(){
  setInterval(get_fb, 10000);
});

function get_fb(){
  var feedback = $.ajax({
    type: "POST",
    url: "feedback.php",
    async: false
  }).responseText;

  $('div.feedback-box').html(feedback);
}</code>

<code class="php">$result = mysql_query("SELECT * FROM feedback ORDER BY RAND() LIMIT 0,1");
while($row = mysql_fetch_array($result))
{
  $name = $row['name'];
  $location = $row['location'];
  $feedback = $row['feedback'];

  echo "
    <p>Name: $name, Location: $location, Feedback: $feedback.</p>
    ";
} </code>

<code class="javascript">function get_fb(){
  var feedback = $.ajax({
    type: "POST",
    url: "feedback.php",
    async: false
  }).success(function(){
    setTimeout(function(){get_fb();}, 10000);
  }).responseText;

  $('div.feedback-box').html(feedback);
}</code>