ช่วยดูโค๊ดให้ทีครับ เรื่่องฟอร์มแก้ไขโดยใช้ javascript เลือกจังหวัด อำเภอ ตำบล

<?php       
$objConnect = mysql_connect("localhost","root","root") or die("Error Connect to Database");     
$objDB = mysql_select_db("phpproject");    
@mysql_query("SET NAMES TIS620"); 
?> 
<script language = "JavaScript">         
//**** List Province (Start) ***//         
function ListProvince(SelectValue)         
{             
frmMain.District_id.length = 0             
frmMain.Tambon_id.length = 0                        
//*** Insert null Default Value ***//            
var myOption = new Option('','')               
frmMain.District_id.options[frmMain.District_id.length]= myOption                          
<?             
$intRows = 0;             
$strSQL = "SELECT * FROM district  ";            
$objQuery = mysql_query($strSQL) or die ("Error Query [".$strSQL."]");             
$intRows = 0;             
while($objResult = mysql_fetch_array($objQuery))            
{             
$intRows++;             
?>                            
x = <?=$intRows;?>;                 
mySubList = new Array();   
strGroup = <?=$objResult["Province_id"]?>                            
strValue = "<?=$objResult["District_id"];?>";               
strItem = "<?=$objResult["District_name"];?>";
mySubList[x,0] = strItem;                              
mySubList[x,1] = strGroup;                
mySubList[x,2] = strValue;   
              
if (mySubList[x,1] == SelectValue){                   
var myOption = new Option(mySubList[x,0], mySubList[x,2])                      
frmMain.District_id.options[frmMain.District_id.length]= myOption                                    
}             
<?            
}             
?>                                                                            
}         
//**** List Province (End) ***//         
//**** List Amphur (Start) ***//         
function ListAmphur(SelectValue)         
{             
frmMain.Tambon_id.length = 0             
//*** Insert null Default Value ***//             
var myOption = new Option('','')              
frmMain.Tambon_id.options[frmMain.Tambon_id.length]= myOption                       
<?             
$intRows = 0;             
$strSQL = "SELECT * FROM tambon  ";             
$objQuery = mysql_query($strSQL) or die ("Error Query [".$strSQL."]");            
$intRows = 0;            
while($objResult = mysql_fetch_array($objQuery))             
{             
$intRows++;             
?>                 
x = <?=$intRows;?>;                 
mySubList = new Array();                                  
strGroup = <?=$objResult["District_id"];?>;                 
strValue = "<?=$objResult["District_id"];?>";        
strItem = "<?=$objResult["Tambon_name"];?>";                 
mySubList[x,0] = strItem;                
mySubList[x,1] = strGroup;                 
mySubList[x,2] = strValue;                                            
if (mySubList[x,1] == SelectValue){                     
var myOption = new Option(mySubList[x,0], mySubList[x,2])                      
frmMain.Tambon_id.options[frmMain.Tambon_id.length]= myOption                                   
}             
<?            
}            
?>                                                                            
}         
//**** List Amphur (End) ***//  
 </script>

นี่คือ select menuที่ดึงมาเพื่อแก้ไข

<select name="Province_id" id="Province_id" style="width:120px" onchange= "ListProvince(this.value)">
                      <option value="">---โปรดเลือก---</option>
                      <?php 
$strSQL = "SELECT * FROM province ORDER BY province_id ASC ";     
$objQuery = mysql_query($strSQL) or die ("Error Query [".$strSQL."]");     
 while($rs1 = mysql_fetch_array($objQuery))
              {?>
                      <option value="<?php echo $rs1["Province_id"] ?>"
		  <?php if($rs1["Province_id"]==$objResult["Province_id"]) {echo "selected = selected "; }  ?>> <?php echo $rs1["Province_name"] ?> </option>
                      <?php }?>
                    </select>
อำเภอ :
<select name="District_id" id="District_id"  style="width:120px" onchange="ListAmphur(this.value)">
  <option value="">---โปรดเลือก---</option>
  <?php 
$strSQL = "SELECT * FROM district ORDER BY District_id ASC ";     
$objQuery = mysql_query($strSQL) or die ("Error Query [".$strSQL."]");     
 while($rs1 = mysql_fetch_array($objQuery))
              {?>
  <option value="<?php echo $rs1["District_id"] ?>"
		  <?php if($rs1["District_id"]==$objResult["District_id"]) {echo "selected = selected "; }  ?>> <?php echo $rs1["District_name"] ?> </option>
  <?php }?>
</select>
                </p>
                  <p> ตำบล  :
                    <select id="Tambon_id" name="Tambon_id" style="width:120px" >
                      <option value="">---โปรดเลือก---</option>
                      <?php 
$strSQL = "SELECT * FROM tambon  ";     
$objQuery = mysql_query($strSQL) or die ("Error Query [".$strSQL."]");     
 while($rs1=mysql_fetch_array($objQuery))
 {?>
                      <option value="<?php echo $rs1["Tambon_id"]?>"
<?php if($rs1["Tambon_id"]==$objResult["Tambon_id"]) {echo "selected = selected "; }  ?>> <?php echo $rs1["Tambon_name"] ?> </option>
<?php }?>
                    </select>