title: jqGrid filter dates only working for equals, not greater than
body: <p>I've been trying to figure out how to get my date column in jqGrid to filter using "less than or equals" or "greater than or equals" ("le" and "ge" respectively) but it only works with "eq" also doesn't work with "lt" or "gt"</p>
  
  <p>Please see this <a href="http://jsfiddle.net/Jg2DT/54/" rel="nofollow">jsfiddle: http://jsfiddle.net/Jg2DT/54/</a> for the code example.</p>
  
  <pre><code>colModel: [
          { name: 'id', width: 60, sorttype: "int", searchoptions:{clearSearch: false}},
          { name: 'name', width: 70, searchoptions:{clearSearch: false}},
          { name: 'surname', width: 100, searchoptions:{clearSearch: false}},
          { name: 'startdate', sorttype: "date", width: 90, 
              searchoptions: {
                  searchOperators: true,
                  sopt: ['gt', 'eq', 'ge'],
                  clearSearch: false,
                  dataInit: function(elem) {
                      $(elem).datepicker({
                          dateFormat: 'mm/dd/yy',
                          autoSize: true,
                          changeYear: true,
                          changeMonth: true,
                          showButtonPanel: true,
                          showWeek: true
                      });
                  }
              },
              formatoptions: {
                  srcformat:'mm/dd/Y',
                  newformat:'mm/dd/Y'
              }
          }
  ]
  </code></pre>
  
  <p>Note that if you do an equals it works fine but nothing else works.</p>
  
  <p>Thanks in advance for any help.</p>