title: Onshow event of datepicker
body: <p>I want add class to datepicker when display. I wrote this code but don't work .</p>
  
  <p>how to do this?</p>
  
  <pre><code>$(targetEl).datepicker({
        dateFormat: "yy/mm/dd",
        changeMonth: true,
        changeYear: true,
        yearRange: "-100:-13",
        defaultDate: "-13y",
        regional: '',
        isRTL: true,
        onShow: function () { $("#ui-datepicker-div").addClass("DatePikerEN"); }
  
  });
  </code></pre>