title: Why it works only once?
body: <p>It must be an always toggle div. With no using 'toggle' method.</p>
  
  <pre><code>$(document).ready(function(){
        function brFun() {
          $('div').addClass('br');
          setTimeout('$(\'div\').removeClass(\'br\')', 2000)
        };
        setInterval(brFun, 2000);
      });
  </code></pre>