title: JQuery Datatables Close Each Open Row with fnClose()
body: <p>I'm trying to make a Button which closes <em>onClick</em> all opened <em>tr</em> in my Datatable.</p>
  
  <p>I'm opening the rows with the following command :</p>
  
  <pre><code>oTable.fnOpen(nTr, fnFormatDetails(oTable, nTr), 'newtr');
  </code></pre>
  
  <p>Is there a simply possibility to close all opened <em>tr</em> rows in my Datatable?</p>