Show data that is null

kcl

I'm newbi in DataTables, the DataTables is working well. Got the data via my webservice. Now I want a checkbox for content that have "null" (empty field in mysql database). When the user click on the check box it need to show all the empty fields. I thought it is possible with fnFilter but it didn't work.

Do I need to do this:
$('#langTransTable').dataTable( {
"bProcessing": true,
"bServerSide": true,
"bJQueryUI": true,
"fnFilter": [null,2] //2 inside my third kolom.
} );

thanks for your time