DataTables + Bootstrap + FixedHeader

HTML

<script src="//code.jquery.com/jquery-1.10.2.min.js"></script>
<script src="//cdn.datatables.net/1.10.0/js/jquery.dataTables.js"></script>
<script src="//cdn.datatables.net/plug-ins/e9421181788/integration/bootstrap/3/dataTables.bootstrap.js"></script>
<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css">
<link rel="stylesheet" href="//cdn.datatables.net/plug-ins/e9421181788/integration/bootstrap/3/dataTables.bootstrap.css">
<script src="//cdn.datatables.net/fixedheader/2.1.1/js/dataTables.fixedHeader.min.js"></script>
<link rel="stylesheet" href="//cdn.datatables.net/fixedheader/2.1.1/css/dataTables.fixedHeader.css">
<table id="example" class="table table-striped table-bordered" cellspacing="0" width="100%">
        <thead>
            <tr class="above">
                <th colspan="2"></th>
                <th colspan="2">Test</th>
                <th colspan="2"></th>
            </tr>
            <tr>
                <th>Name</th>
                <th>Position</th>
                <th>Office</th>
                <th>Age</th>
                <th>Start date</th>
                <th>Salary</th>
            </tr>
        </thead>
 
        <tfoot>
            <tr>
                <th>Name</th>
                <th>Position</th>
                <th>Office</th>
                <th>Age</th>
                <th>Start date</th>
                <th>Salary</th>
            </tr>
        </tfoot>
 
        <tbody>
            <tr>
                <td>Tiger Nixon</td>
                <td>System Architect</td>
                <td>Edinburgh</td>
                <td>61</td>
                <td>2011/04/25</td>
                <td>$320,800</td>
            </tr>
            <tr>
                <td>Garrett Winters</td>
                <td>Accountant</td>
                <td>Tokyo</td>
                <td>63</td>
                <td>2011/07/25</td>
                <td>$170,750</td>
            </tr>
            <tr>
               ...

CSS

body { font-size: 140%; padding: 1em; }
div.FixedHeader_Cloned table { margin: 0 !important }

.fixedHeader {
  background: white;
}
.above th {
  text-align: center;
}


/* Not working for the floating header! */
.dataTable thead {
    empty-cells: hide;
}
/* Works for all the headers
*/
.dataTable thead :empty {
    visibility: hidden;
}

JavaScript

$(document).ready(function() {
    var table = $('#example').DataTable();
    new $.fn.dataTable.FixedHeader(table);
} );