ata: 'office' },
                { data: 'extn' },
                { data: 'start_date' },
                { data: 'salary', render: function (data, type, row) {
                return type === 'export' ?
                data.replace( /[$,]/g, '' ) :
                data;
                } }
                ],
                dom: 'Bfrtip',
                buttons: [
                {
                extend: 'copyHtml5',
                exportOptions: { orthogonal: 'export' }
                },
            