title: How to add one second to a time string with javascript/jquery
body: <p>I am trying to create a timer with Javascript but I don't know how to add one second to a time string.</p>
  
  <p>Time string: 03:31:15</p>
  
  <pre><code>function updateWorked() {
          var time = $("#worked").html();
          ???
          $("#worked").html(wtime);
  }
  
  $(document).ready(function() {
      setInterval('updateWorked()', 1000);
  });
  </code></pre>
  
  <p>What should I write in "???" to make this work?</p>