select n show

<!DOCTYPE html>
<html>
  <head>
    <title>Select Worksheet</title>
    <script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>
  <head>
  <body>
  <select name="kodeworksheet" id="pilih" class="easyui-validatebox" required="true">
  <?php
  include("../koneksi/conn.php");
  $sql="SELECT kodeworksheet FROM tmworksheet ORDER BY kodeworksheet";
  $query = mysql_query($sql);
  while($row=mysql_fetch_object($query))
  {
    echo "<option value=\"".$row->kodeworksheet."\">".$row->kodeworksheet."</option>\n";
  }
  ?>
  </select>
  <input type="text" id="biayaworksheet" readonly="readonly" />
  <input type="text" id="namaworksheet" readonly="readonly" />
  <input type="text" id="keterangan" readonly="readonly" />
  <script type="text/javascript">
  $('#pilih').change(function(){
    $.ajax({
      type=:'POST',
      datatype:'json',
      url:'proses.php',
      data:'id='+$(this).val(),
      success:function(html){
        $('#biayaworksheet').val(html.biaya);
        $('#namaworksheet').val(html.nama);
        $('#keterangan').val(html.keterangan);
      }
    });
  });
  </script>
  </body>
</html>

//========= file: proses.php =================
<?php
  $id=isset($_POST['id'])?$_POST['id']:"";
  include("../koneksi/conn.php");
  $where=!empty($id)" WHERE kodeworksheet='".$id."' ":"";
  $sql="SELECT biayaworksheet,namaworksheet,keterangan FROM tmworksheet ".$where." ORDER BY kodeworksheet";
  $query = mysql_query($sql);
  if($query->mysql_num_rows>0){
    $row=mysql_fetch_object($query);
    $result=array("biaya"=>$row->biayaworksheet,"nama"=>$row->namaworksheet,"keterangan"=>$row->keterangan);
  }else{
    $result=array("biaya"=>"","nama"=>"","keterangan"=>"");
  }
  return json_encode($result);
}
?>