fungsi error beserta js

	//-------------------Control-------------------------------------------------

  public function index() {
		Template::set('toolbar_title', 'Manage Employees List');
		Template::render();
  }

  public function pagination() {
    $this->employees_list_model->search_document();
  }

	//--------------------Model------------------------------------------------

  public function search_document() {
    $input = array('dataperpage', 'query', 'curpage');
    foreach ($input as $val)
      $$val = $this->input->post($val);

    $query = $this->db->escape_like_str($query);
    $where = "'no_badge' LIKE '%{$query}%' OR 'position' LIKE '%{$query}%'";

    $query = $this->db->query("SELECT COUNT('id') AS 'HASIL' FROM bf_employees_list WHERE

$where");
    $total = $query->row()->HASIL;
    $npage = ceil($total / $dataperpage);

    $start = $curpage * $dataperpage;
    $end = $start + $dataperpage;
    $query = $this->db->query("SELECT 'no_badge', 'position', 'status' FROM bf_employees_list

WHERE $where LIMIT $start, $dataperpage");
    $hasil = array(
      'data' => array(),
      'pagination' => '',
      'numpage' => $npage - 1,
    );
    if ($query->num_rows() > 0) {
      foreach ($query->result() as $row) {
        $hasil['data'][] = array(
          'judul' => $row->no_badge,
          'pengarang' => $row->position,
          'tahun' => $row->status
        );
      }
    }

    $hasil['pagination'] .= '<ul>
      <li class="'. ($curpage == 0 ? 'disabled' : '') .'" onclick="return Document.prevPage

()"><a href>&laquo;</li>';
    for ($i = 1; $i <= $npage; $i++) {
      $hasil['pagination'] .= '<li class="' . ($curpage == ($i - 1) ? 'active' : '') . '"

onclick="return Document.setPage(' . ($i - 1) .')"><a href>' . $i . '</a></li>';
    }
    $hasil['pagination'] .= '<li class="' . ($curpage == $npage - 1 ? 'disabled' : '') . '"

onclick="return Document.nextPage()"><a href>&raquo;</a></li>
      </ul>';

    echo json_encode($hasil, JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_QUOT | JSON_HEX_AMP);
  }

	//--------------------Views------------------------------------------------
<script>
var Document = {
  param: {
    dataperpage: 10, // jumlah data per halaman
    query: '',
    curpage: 0,
    numpage: 0
  },
  url: "<?=base_url().'/admin/employees/employees_list/'?>",
  search: function() {
    this.param.query = $('#query').val();
    this.param.curpage = 0;
    this.loadData();
    return false;
  },
  setPage: function(n) {
    this.param.curpage = n;
    this.loadData();
    return false;
  },
  prevPage: function() {
    if (this.param.curpage > 0) {
      this.param.curpage--;
      this.loadData();
    }
    return false;
  },
  nextPage: function() {
    if (this.param.curpage < this.param.numpage) {
      this.param.curpage++;
      this.loadData();
    }
    return false;
  },
  loadData: function() {
    $.ajax({
      url: Document.url,
      type: 'POST',
      dataType: 'json',
      data: jQuery.param(Document.param),
      success: function(d) {
        $('#pagination').html(d.pagination);
        Document.param.numpage = d.numpage;
        var t = '', dt = {};
        for (var i = 0; i < d.data.length; i++) {
          dt = d.data[i];
          t += '<tr><td>' + dt.judul +'</td>' +
             '<td>' + dt.pengarang + '</td>' +
             '<td>' + dt.tahun + '</td></tr>';
        }
        $('#document-data').html(t); // id dari tbody tabel data
      }
    });
  }
}

$(document).ready(function() {
  Document.search();
});
</script>

<div class="admin-box">
	<h3>Employees List</h3>

        <form class="form-inline">
          <input type="text" name="query" id="query" class="input-large"> &nbsp;
          <button class="btn" onclick="return Document.search()"><i class="icon-search"></i>

Cari</button>
        </form>
        <hr>
        <table class="table table-bordered table-condensed table-striped">
          <thead>
            <tr>
              <th>Judul</th>
              <th>Pengarang</th>
              <th>Tahun</th>
            </tr>
          </thead>
          <tbody id="document-data">
            <tr>
              <td></td>
              <td></td>
              <td></td>
            </tr>
          </tbody>
        </table>
        <hr>
        <div class="pagination pagination-centered pagination-medium" id="pagination">

</div>