p',
            lengthMenu: [
                [ 15, 30, 50, 100, -1 ],
                [ '15 rows', '30 rows', '50 rows', '100 rows', 'Show all' ]
            ],
            buttons: [
            {
                extend:    'copyHtml5',
                text:      '<i class="fa fa-files-o"></i>',
                titleAttr: 'Copy'
            },
            {
                extend:    'excelHtml5',
                text:      '<i class="fa fa-file-excel-o"></i>',
                titleAttr: 'Excel'
         