อยากสอบถามเรื่อง การแก้ไขข้อมูลใน dropdownlist ที่ดึงข้อมูลจากฐานข้อมูล

<script type="text/javascript" src="jquery.js" ></script>
	<script>				
		function changeProvince(){
			$.ajax({
				url: "changeProvince.php",
				data: "ProvinceId=" + $("#ProvinceId").val(),
				type: "POST",
				async:false,
				success: function(data, status) {	
						$("#DistinctId").html(data);	 
				},
				error: function(xhr, status, exception) { alert(status); }
			});
		}
	</script>

<tr><td align="right">จังหวัด</td><td align="center">
<?
    include("connectDB.php");
	$sqlp="select * from province ";
    $resultp = mysql_query($sqlp);
	echo "<select name = 'ProvinceId' onchange='changeProvince()' id='ProvinceId'>";
    while($rowp = mysql_fetch_array($resultp))
    {  
		if($row7["ProvinceId"] == $rowp["ProvinceId"])
		 echo "<option value='".$rowp["ProvinceId"]."'selected='selected' >".$rowp["Province"]."</option>";
		 else
		 echo "<option value='".$rowp["ProvinceId"]."' >".$rowp["Province"]."</option>";
    }
	echo "</select>";
?>		
</td></tr>
<tr><td align="right">เขต</td><td align="center">
<?
    include("connectDB.php");
	echo "<span id='DistinctId'>";
	echo "<select name = 'DistinctId'>";
	echo "<option value='0'>ไม่ระบุ</option>";
	echo "</select>";
	echo "</span>";


    mysql_close($con);
?>