title: filtering data not equal to a specific text jqgrid
body: <p>Hi ihave loaded  a jqgrid with jason data.</p>
  <p>I have this filtering</p>
  <pre><code>  //  Fetch the text from our &lt;input&gt; control
              var searchString = 'N';
  ​
              //  Prepare to pass a new search filter to our jqGrid
              var f = { groupOp: &quot;AND&quot;, rules: [] };
  ​
              //  Remember to change the following line to reflect the jqGrid column you want to search for your string in
              //  In this code, I'm searching through the CAR_NO column.
  ​
              f.rules.push({ field: &quot;CLOSEDDATE&quot;, op: &quot;cn&quot;, data: searchString });
  ​
              var grid = $('#Auditgrid');
  ​
              grid[0].p.search = f.rules.length &gt; 0;
              $.extend(grid[0].p.postData, { filters: JSON.stringify(f) });
              grid.trigger(&quot;reloadGrid&quot;, [{ page: 1 }]);
  </code></pre>
  <p>It seach close date with <code>N</code> value on it
  but what i want is to filter data with a <code>CLOSEDDATE</code> not equal to <code>N</code></p>
  <p>is it possible with my current filtering code?</p>