title: JqGrid, DatePicker no value in the toolbar when selecting
body: <p>I'm trying to add a Datepicker filter on a JQGrid toolbar. When I click on the date filter, no problem the Datepicker shows up, but when I select my date, nothing happen. The date I've chose doesn't appear in the toolbar filter and of curse no search  is launch.
  Did I miss something?
  Here is my code:</p>
  
  <pre><code>colModel: [                     
      { name: 'Period', index: 'Period', align: 'left', formatter: 'date',
          search: true,
          searchoptions: {
          dataInit: function (el) {
              $(el).datepicker({
                  changeYear: true,
                  changeMonth: true,
                  showButtonPanel: true,
                  dateFormat: 'dd-mm-yy',
                  onSelect: function(dateText, inst) {
                      $("#grid_id")[0].triggerToolbar();
                  }
              });
          }
      }}
  ]
  </code></pre>
  
  <p>Thanks in advance for your help!</p>