I use the javascript plugin dataTables.fixedHeader and fill the data with ajax. Now I have the problem, that the width of each data-column is dynamically and the header stays on the same static width.

Code:
HTML:
<table class="table table-striped table-bordered table-hover" id="custTable">
                    <thead>
                        <tr>
                            <th>
                                ......
                            </th>
                            <th>
                                ......
                            </th>
                            <th>
                                ......
                            </th>
......
                        </tr>
                    </thead>
                    <tbody id="dataList"></tbody>
                </table>
JS:
table = $('#custTable').DataTable({
            "dom": "frtiS",
            "deferRender": true,
        });
Fill it:
$('#custTable').dataTable().fnAddData([
               xyz, xyz, xyz, ...
                        ]);
 
    