$(document).ready(function () {
            $('#staff_look').DataTable({
                'ordering': true,
                'lengthMenu': [10, 25, 50, 75, 100]
            });
        });

$.post("<?php echo base_url('controller/function') ?>", {'id': id},
    function (data)
    {
        if (data.length > 0) {
            $('#tbl_body').find('tr').remove();
            for (j = 0; j < data.length; j++) {
                $('#tbl_body').append("<tr><td>" + (j + 1) + "</td><td>" + data[j]['reg_no'] + "</td><td>" + data[j]['first_name'] + " " + data[j]['last_name'] + "</td><td>" + data[j]['nic_no'] + "</td></tr>");
            }
        }
    },
    "json"
    );