ขอรบกวนอีกแล้วค่ะ (โค๊ดรันไม่ขึ้นค่ะ หาจุดผิดไม่เจอจริงๆ เลยต้องรบกวนพี่ๆ อีกแล้ว)

<div id="col-right" >
  <form id="form1" name="form1" method="post"  action="">
    <p>
      <?
$id_edit=$_GET['id_edit'];
include"connect.php";
$sql="select * from  tb_booking  where id_booking='$id_edit' ";
$result=mysql_db_query($dbname,$sql);
$rs=mysql_fetch_array($result);

$id_booking=$rs[id_booking];
$fname_booking=$rs[fname_booking];
$lname_booking=$rs[lname_booking];
$phone_booking=$rs[phone_booking];
$date_time_start=$rs[tel_booking];
$date_time_end=$rs[agencies_booking];
$address_booking = $rs[address_booking];
$province_booking = $rs[province_booking];
$post_booking = $rs[post_booking];
$objective_booking = $rs[objective_booking];
$time_booking = $rs[time_booking];
$end_booking = $rs[end_booking];
$code_booking = $rs[code_booking];
?>
    </p>
    <p>&nbsp; </p>
    <table width="660" border="0"  id="boxer" cellspacing="0">
        <tr>
          <td colspan="2" class="boxing"><div align="center"><strong>แก้ไขข้อมูลการสั่งจอง</strong></div></td>
        </tr>
        <tr>
          <td width="278"><div align="right">เลขที่ใบจอง :</div></td>
          <td width="408"><div align="left">
            <?=$id_booking?>
          </div></td>
        </tr>
        <tr>
          <td><div align="right">ชื่อ : </div></td>
          <td><div align="left">
            <input name="fname_booking" type="text" id="fname_booking" value="<?=$fname_booking?>" />
          </div></td>
        </tr>
        <tr>
          <td><div align="right">นามสกุล :</div></td>
          <td><div align="left">
            <input name="lname_booking" type="text" id="lname_booking" value="<?=$lname_booking?>" />
          </div></td>
        </tr>
        <tr>
          <td><div align="right">เบอร์โทรศัพท์ :</div></td>
          <td><div align="left">
            <input name="phone_booking" type="text" id="phone_booking" value="<?=$phone_booking?>" />
          </div></td>
        </tr>
        <tr>
          <td><div align="right">เบอร์โทรศัพท์เคลื่อนที่ :</div></td>
          <td><div align="left">
            <input name="tel_booking" type="text" id="tel_booking" value="<?=$tel_booking?>" />
          </div></td>
        </tr>
        <tr>
          <td><div align="right">ชื่อหน่วยงาน :</div></td>
          <td><div align="left">
            <input name="agencies_booking" type="text" id="agencies_booking" value="<?=$agencies_booking?>" />
          </div></td>
        </tr>
        <tr>
          <td><div align="right">ที่อยู่ที่สามารถที่ติดต่อได้ :</div></td>
          <td><div align="left">
            <textarea name="address_booking" id="address_booking" cols="45" rows="10"><?=$address_booking?>
            </textarea>
          </div></td>
        </tr>
        <tr>
          <td><div align="right">จังหวัด :</div></td>
          <td><div align="left">
            <input name="province_booking" type="text" id="province_booking" value="<?=$province_booking?>" />
          </div></td>
        </tr>
        <tr>
          <td><div align="right">รหัสไปรษณ๊ :</div></td>
          <td><div align="left">
            <input name="post_booking" type="text" id="post_booking" value="<?=$post_booking?>" />
          </div></td>
        </tr>
        <tr>
          <td colspan="2"><div align="center"></div></td>
        </tr>
        <tr>
          <td colspan="2"><div align="center"><strong>รายละเอียดการจอง</strong></div></td>
        </tr>
        <tr>
          <td><div align="right">ห้องที่จอง :</div></td>
          <td><div align="left"></div></td>
        </tr>
        <tr>
          <td><div align="right">วัตถุประสงค์การจองห้อง :</div></td>
          <td><div align="left">
            <label for="objective_booking"></label>
            <textarea name="objective_booking" id="objective_booking" cols="45" rows="7"><?=$objective_booking?>
            </textarea>
          </div></td>
        </tr>
        <tr>
          <td><div align="right">วันที่/เวลาเริ่มใช้ : </div></td>
          <td><div align="left">
            <input name="time_booking" type="text" id="time_booking" value="<?=$time_booking?>" />
          </div></td>
        </tr>
        <tr>
          <td><div align="right">สิ้นสุดการใช้ : </div></td>
          <td><div align="left">
            <input name="end_booking" type="text" id="end_booking" value="<?=$end_booking?>" />
          </div></td>
        </tr>
        <tr>
          <td>&nbsp;</td>
          <td><div align="left"></div></td>
        </tr>
        <tr>
          <td><div align="right"></div></td>
          <td ><div align="left" ></div></td>
        </tr>
        <tr>
          <td colspan="2" align="center"  class="boxinger"><div align="center">
            <p>
              <input type="submit" name="button" id="button" value="แก้ไขเรียบร้อยแล้ว" />
              <input type="submit" name="button2" id="button2" value="ยกเลิก" />
              <input name="id_edit" type="hidden" value="<?=$id_edit?>" />
            </p>
            <p>&nbsp;</p>
          </div></td>
        </tr>
      </table>
    <p>&nbsp;</p>
    <p>&nbsp;</p>
  </form>

<?
$head_ac=$_POST[head_ac];
$detail_ac=$_POST[detail_ac];
$date_time_start=$_POST[date_time_start];
$date_time_end=$_POST[date_time_end];
include "connect.php";
$sql="update tb_activity  set  head_ac='$head_ac', detail_ac='$detail_ac', date_time_start='$date_time_start', date_time_end='$date_time_end' where id_ac='$id_ac' ";
$result=mysql_db_query($dbname,$sql);
if  ($result)   {
echo "<script>alert('แก้ไข  ข้อมูลเรียบร้อยแล้ว')</script>";
echo"<script language='javascript'>window.location.href='admin_activity.php'</script>";
	}  else  {
	echo "<script>alert('ไม่สามารถแก้ไขข้อมูลได้')</script>";
echo"<script language='javascript'>window.location.href='admin_activity_edit.php'</script>";
	}
	mysql_close();
?>