ขอสอบถาม ผมต้องการจะทำ Ajax Selection เลือกจังหวัด,อำเภอ,ตำบล

<tr height="40">
	<td align="right">จังหวัด :&nbsp;</td>
    <td><select name="province" onchange="getAddress(this.name, 'District', 'a')" class="form-control">
    <option value=""> เลือกจังหวัด </option>
    <?php
	include_once 'inc/config.php'; 
	include_once 'inc/database.class.php'; 
	
	$juice = new MY_SQL; 
	$juice->fncConnectDB();
	$juice->fncSelectDB();
	$juice->set_char_utf8();
	
	$province = $juice->fncSelect("PROVINCE_ID,PROVINCE_NAME","province","ORDER BY PROVINCE_NAME ASC");
	foreach($province as $read){ ?><option value="<?=$read['PROVINCE_ID']?>,<?=$read['PROVINCE_NAME']?>"><?=$read['PROVINCE_NAME']?></option><? } ?>
    </select></td>
</tr>

$sql = "INSERT INTO member (fname,lname,Address,PhoneNumber,Email,Birthday,Idcard,province, District,SubDistrict,Zipcode,UserName,Password,fileupload) VALUES ('$fname','$lname','$_POST[Address]','$_POST[PhoneNumber]', '$email','$_POST[birthday]','$_POST[idcard]','$_POST[province]', '$_POST[District],'$_POST[SubDistrict],'$_POST[Zipcode]','$_POST[UserName]','$password_md5','$newname')";