title: Error in localize DatePicker
body: <p>I'm trying to localize jquery datepicker but since I'm not an expert in jquery I get an error and I don't know how to fix it.</p>
  
  <p>Error</p>
  
  <pre><code>TypeError: 'undefined' is not an object (evaluating '$.ui.datepicker.regional')
  </code></pre>
  
  <p>Here is the code of datepicker</p>
  
  <p><strong>calendar.js</strong></p>
  
  <pre><code>$(function() {
      $( ".from" ).datepicker({
        defaultDate: "+1w",
        dateFormat: "dd/mm/yy",
        changeMonth: true,
        numberOfMonths: 1,
        onClose: function( selectedDate ) {
          $( ".to" ).datepicker( "option", "minDate", selectedDate );
        }
    });
      $( ".to" ).datepicker({
        defaultDate: "+1w",
        dateFormat: "dd/mm/yy",
        changeMonth: true,
        numberOfMonths: 1,
        onClose: function( selectedDate ) {
          $( ".from" ).datepicker( "option", "maxDate", selectedDate );
        }
      });
    });
  </code></pre>
  
  <p>and the localization</p>
  
  <pre><code>&lt;script src="//jquery-ui.googlecode.com/svn-history/r3875/branches/labs/datepicker2/ui/i18n/jquery.ui.datepicker-it.js" &gt;&lt;/script&gt;
  </code></pre>
  
  <p>Both of them come after the following code</p>
  
  <pre><code>&lt;link rel="stylesheet" href="//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css"&gt;
          &lt;script src="//code.jquery.com/jquery-1.10.2.js"&gt;&lt;/script&gt;
          &lt;script src="//code.jquery.com/ui/1.10.4/jquery-ui.js"&gt;&lt;/script&gt;
  </code></pre>