title: How do i select rows displayed in current page in datatables 1.9?
body: <p>I am using datatable 1.9 along with tabletool.js 2.1.5.
  I have 23 records in total and 10 records per page. I want to select the currently displaying page records.</p>
  
  <p>I have used TableTools.js buttons (select_all). But this selects all the rows of datatable.
  I have tried</p>
  
  <pre><code>$('#file-records&gt; tbody &gt; tr').each(function() {                                
     TableTools.fnGetInstance('file-records').fnSelect($(this));                                              
  });
  </code></pre>
  
  <p>The above code gives me an error
  <strong>Uncaught TypeError: Cannot read property 'nTr' of undefined</strong></p>