title: i need to modify rowCallback jquery
body: <p>Working on <strong>django</strong>. Need to modify <strong>rowCallback</strong> jquery. Page is loading with multipleSelect 
  dataTable and have server based pagination. Now i want to <strong>change the color of one column</strong> on the base of data.
  And I couldn't understand what is happening inside this rowCallback function as the documentation is not helping for me.</p>
  
  <pre><code>$('#example').dataTable( {
    "rowCallback": function( row, data ) {
      if ( data.grade == "A" ) {
        $('td:eq(4)', row).html( '&lt;b&gt;A&lt;/b&gt;' );
      }
    }
  } );
  </code></pre>
  
  <p>Can anyone explains last 2 lines, I am kind of new to this.</p>