title: How to change a background color of jQueryUI Progressbar?
body: <p>How to change a background color of jQueryUI Progressbar?</p>
  
  <p>Im trying to use:</p>
  
  <p><code>
  $('#progressbar div').css({backgroundColor: '#9CFF29'});
  </code></p>
  
  <p>but no success :(</p>
  
  <p>Anybody can help me?
  Thanks!</p>