พอดีไปโหลด Javascript "จังหวัด"มาครับแล้วมันไม่ลงดาต้าเบสต้องทำไงคับ

<script language=Javascript>
        function Inint_AJAX() {
           try { return new ActiveXObject("Msxml2.XMLHTTP");  } catch(e) {} //IE
           try { return new ActiveXObject("Microsoft.XMLHTTP"); } catch(e) {} //IE
           try { return new XMLHttpRequest();          } catch(e) {} //Native Javascript
           alert("XMLHttpRequest not supported");
           return null;
        };

        function dochange(src, val) {
             var req = Inint_AJAX();
             req.onreadystatechange = function () { 
                  if (req.readyState==4) {
                       if (req.status==200) {
                            document.getElementById(src).innerHTML=req.responseText; //รับค่ากลับมา
                       } 
                  }
             };
             req.open("GET", "localtion.php?data="+src+"&val="+val); //สร้าง connection
             req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8"); // set Header
             req.send(null); //ส่งค่า
        }
		window.onLoad=dochange('province2', -1);
        window.onLoad=dochange('province', -1);     
    </script>

<form method="post" name="insert_customer" action="check_insert1.php" >

จังหวัดทะเบียนรถ&nbsp;&nbsp;&nbsp;&nbsp;
      <span id="province2">
                    <select>
                        <option value="0">- เลือกจังหวัด -</option>
                    </select>
       </span>&nbsp;&nbsp;&nbsp;
  สีรถ&nbsp;&nbsp;
      <input type="text" name="txt15" id="txt15" size="10"  /> 
จังหวัด  
                <span id="province">
                    <select >
                        <option value="0">- เลือกจังหวัด -</option>
                    </select>
                </span>
        <br />
        อำเภอ  
                <span id="amphur">
                    <select >
                        <option value='0'>- เลือกอำเภอ -</option>
                    </select>
<input type="submit" name="Submit" value="บันทึกข้อมูล">
 		<input type="reset" name="Reset" value="ยกเลิก">
        </form>

<?php
ob_start();	
?>


<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<?
include ('config.inc.php');
$province_id = $_POST['province'];
$amphur_id = $_POST['amphur'];
$district_id = $_POST['district'];

$sql_1 = "SELECT * FROM province WHERE PROVINCE_ID = '$province_id' ";
    $result_1 = mysql_query($sql_1);
    $row_1 = mysql_fetch_array($result_1);
    $province_name = $row_1['PROVINCE_NAME'];

    $sql_2 = "SELECT * FROM amphur WHERE AMPHUR_ID = '$amphur_id' ";
    $result_2 = mysql_query($sql_2);
    $row_2 = mysql_fetch_array($result_2);
    $amphur_name = $row_2['AMPHUR_NAME'];

    $sql_3 = "SELECT * FROM district WHERE DISTRICT_ID = '$district_id' ";
    $result_3 = mysql_query($sql_3);
    $row_3 = mysql_fetch_array($result_3);
    $district_name = $row_3['DISTRICT_NAME'];
	
$strSQL = "INSERT INTO customer_new ";

$strSQL .="(date1,c1,c2,c3,c4,c5,c6,c7,c8,c9,c10,c11,c12,c13,c14,c15,c16,c17,c18,c19,c20,c21,c22,c23,c24,c25,c26,c27,c28,c29,c30,c31,c32,c33) ";
$strSQL .="VALUES ";
	$strSQL .="('".$_POST["dateInput"]."','".$_POST["txt1"]."','".$_POST["txt2"]."','".$_POST["txt3"]."','".$_POST["txt4"]."' ";
	$strSQL .=",'".$_POST["txt5"]."','".$_POST["txt6"]."','".$_POST["txt7"]."','".$_POST["txt8"]."','".$_POST["txt9"]."' ";
	$strSQL .=",'".$_POST["txt10"]."','".$_POST["txt11"]."','".$_POST["txt12"]."','".$_POST["txt13"]."','".$province_id."' ";
	$strSQL .=",'".$_POST["txt15"]."','".$_POST["txt16"]."','".$_POST["txt17"]."','".$_POST["txt18"]."','".$_POST["txt19"]."' ";
	$strSQL .=",'".$_POST["txt20"]."','".$_POST["txt21"]."','".$_POST["txt22"]."','".$_POST["txt23"]."','".$_POST["txt24"]."' ";
	$strSQL .=",'".$_POST["txt25"]."','".$_POST["txt26"]."','".$_POST["txt27"]."','".$_POST["txt28"]."','".$province_id."' "; 
	$strSQL .=",'".$amphur_id."','".$_POST["txt31"]."','".$_POST["txt32"]."','".$_POST["txt33"]."') ";
$objQuery = mysql_query($strSQL);
$strID_run = mysql_insert_id();
if($objQuery)
{
	echo "<script language='javascript'>alert('complete');history.back();window.location='user_page1.php?id=4';</script>";
	
	
}
else
{
	echo "Error Save [".$strSQL."]";
}

mysql_close();

?>

<?php
    header("content-type: text/html; charset=utf-8");
    header ("Expires: Wed, 21 Aug 2013 13:13:13 GMT");
    header ("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
    header ("Cache-Control: no-cache, must-revalidate");
    header ("Pragma: no-cache");

    include "config.inc.php";
    //conndb();

    $data = $_GET['data'];
    $val = $_GET['val'];


         if ($data=='province') { 
              echo "<select name='province' onChange=\"dochange('amphur', this.value)\">";
              echo "<option value='0'>- เลือกจังหวัด -</option>\n";
              $result=mysql_query("select * from province order by PROVINCE_NAME");
              while($row = mysql_fetch_array($result)){
                   echo "<option value='$row[PROVINCE_ID]' >$row[PROVINCE_NAME]</option>" ;
              }
		
         } else if ($data=='amphur') {
              echo "<select name='amphur' onChange=\"dochange('district', this.value)\">";
              echo "<option value='0'>- เลือกอำเภอ -</option>\n";                             
              $result=mysql_query("SELECT * FROM amphur WHERE PROVINCE_ID= '$val' ORDER BY AMPHUR_NAME");
              while($row = mysql_fetch_array($result)){
                   echo "<option value=\"$row[AMPHUR_ID]\" >$row[AMPHUR_NAME]</option> " ;
              }
         } else if ($data=='district') {
              echo "<select name='district'>\n";
              echo "<option value='0'>- เลือกตำบล -</option>\n";
              $result=mysql_query("SELECT * FROM district WHERE AMPHUR_ID= '$val' ORDER BY DISTRICT_NAME");
              while($row = mysql_fetch_array($result)){
                   echo "<option value=\"$row[DISTRICT_ID]\" >$row[DISTRICT_NAME]</option> \n" ;
              }
         }
         echo "</select>\n";

        echo mysql_error();
        //closedb();
?>
<?
 include "config.inc.php";
 $data = $_GET['data'];
 $val = $_GET['val'];
 if ($data=='province2') { 
              echo "<select name='province2' onChange=\"dochange('amphur', this.value)\">";
              echo "<option value='0'>- เลือกจังหวัด -</option>\n";
              $result2=mysql_query("select * from province order by PROVINCE_NAME");
              while($row = mysql_fetch_array($result2)){
                   echo "<option value='$row[PROVINCE_ID]' >$row[PROVINCE_NAME]</option>" ;
              }
			}
         echo "</select>\n";

        echo mysql_error();
?>