title: How to add a class in jQuery Datepicker
body: <p>I have a DatePicker jQuery calendar in my Web App. The arrows which change to the previous or the next month are 'transparent' at the moment. However, I realised that it works beacause if I click on the "arrow" the month changes.</p>
  
  <p>I've tried the following code on the Developper Tool and it works:</p>
  
  <pre><code>$('.ui-datepicker-next span').addClass('ui-btn ui-corner-all ui-icon-arrow-r ui-btn-icon-notext ui-alt-icon ui-nodisc-icon');
  $('.ui-datepicker-prev span').addClass('ui-btn ui-corner-all ui-icon-arrow-l ui-btn-icon-notext ui-alt-icon ui-nodisc-icon');
  </code></pre>
  
  <p>How can I add this code sample in mi code? I've tried to include it on the "beforeShow" method but it doesn't work. </p>
  
  <p>Have someone any idea to show the icons?</p>
  
  <p>Thanks!!</p>