การส่งค่าจาก page หนึ่งไปอีก page หนึ่ง โดยส่งค่าให้ <select> แบบสองชั้น มันไม่รับค่าอ่ะครับ

<script language="javascript">
function selValue()
{
	//var val_owner_id,val_f = '';
	//val_b = document.getElementById('txt_owner_id').value;
	//val_f = eval("frm_use_this.numyear_f.value") + "-" + eval("frm_Popup.nummonth_f.value") + "-" + eval("frm_Popup.numdate_f.value");

	window.opener.document.getElementById("txtcompaid").value = document.getElementById('txt_owner_id').value;
	window.opener.document.getElementById("txtcompa").value = document.getElementById('txt_name_owner').value;
	window.opener.document.getElementById("dll_typecom").value = document.getElementById('txt_id_type_owner').value;
	window.opener.document.getElementById("txtleader").value = document.getElementById('txt_leader').value;
	window.opener.document.getElementById("dll_amphoe").value = document.getElementById('txt_code_amphoe').value;
	window.opener.document.getElementById("dll_tambon").value = document.getElementById('txt_code_tambon').value;
	window.opener.document.getElementById("txtaddress").value = document.getElementById('txt_address').value;
	window.opener.document.getElementById("txttel").value = document.getElementById('txt_telephone').value;
	window.opener.document.getElementById("txtfax").value = document.getElementById('txt_fax').value;
	window.opener.document.getElementById("txtemail").value = document.getElementById('txt_email').value;
	window.close();
}
</script>

<script type="text/javascript">
function tambon(SelectValue)
{
frm_register.dll_tambon.length = 0

//*** Insert null Default Value ***//
var myOption = new Option('- เลือกตำบล -','')
frm_register.dll_tambon.options[frm_register.dll_tambon.length]= myOption

<?
$intRows = 0;
$strSQL = "SELECT * FROM tambon ORDER BY code_tambon ASC ";
$objQuery = mysql_query($strSQL) or die ("Error Query [".$strSQL."]");
$intRows = 0;
while($objResult = mysql_fetch_array($objQuery))
{
$intRows++;
?>
x = <?=$intRows;?>;
mySubList = new Array();

strGroup = <?=$objResult["code_amphoe"];?>;
strValue = "<?=$objResult["code_tambon"];?>";
strItem = "<?=$objResult["name_tambon"];?>";
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])
frm_register.dll_tambon.options[frm_register.dll_tambon.length]= myOption
}
<?
}
?>
}


</script>

 <form id="frm_register" name="frm_register" method="post" action="<?=$_SERVER[PHP_SELF];?>?selectyear=<?=$_REQUEST[selectyear];?>" 
onsubmit="JavaScript:return fnc_register();">
  <tr align="center" >

    <td width="50%" valign="top">

	  <fieldset >
		<br><u><div style="font-size:16px; text-align:left;">ข้อมูลผู้ประกอบการ</div></u><br>


		<label class="label" for="txtcompaid">รหัสจดทะเบียน:&nbsp;</label>
  <input class="input" name="txtcompaid" type="text" id="txtcompaid" maxlength="8" onKeyUp="IsNumeric(this.value,this)"/>
  <a onclick="chk_sumits()" target="_blank">
  <img src="../images/arrow.png" align="absbottom" width="25" height="25" border="0" title="เช็คข้อมูลเดิม" alt="เช็คข้อมูลเดิม" style="cursor:hand;"></a>
  
  <br />

  <label class="label" for="txtcompa">ชื่อกลุ่ม/บริษัท:&nbsp;</label>
  <input class="input" name="txtcompa" type="text" id="txtcompa" />
  <br />

  <label class="label" for="txttpecom">เลือกประเภท:&nbsp;</label>

  <select class="select" name="dll_typecom" id="dll_typecom">

<option selected value="">--&nbsp;เลือกประเภท&nbsp;--</option>
<?
$strSQL = "SELECT * FROM type_owner ORDER BY id_type_owner ASC";
$objQuery = mysql_query($strSQL) or die ("Error Query [".$strSQL."]");
while($objResult = mysql_fetch_array($objQuery))
{
?>
<option value="<?=$objResult["id_type_owner"];?>">
<?=$objResult["type_owner"];?>
</option>
<?
}
?>
</select>
  <br />

  <label class="label" for="txtleader">&nbsp;ชื่อเจ้าของ/ประธาน:&nbsp;</label>
  <input class="input" name="txtleader" type="text" id="txtleader" />
		
	  </fieldset>

	</td>
	<td width="50%" valign="top">

	  <fieldset>
		<br><u><div style="font-size:16px; text-align:left;">ที่อยู่/ที่ตั้ง</div></u><br>

<?
switch ($_SESSION["class_logoned"]){

	case 2 :
?>
<label class="label" for="txtamphoe">อำเภอ:&nbsp;</label>
<select class="select" name="dll_amphoe" id="dll_amphoe" onchange = "tambon(this.value)">
<option selected value="">-&nbsp;เลือกอำเภอ&nbsp;-</option>
<?
$strSQL = "SELECT * FROM amphoe ORDER BY code_amphoe ASC";
$objQuery = mysql_query($strSQL) or die ("Error Query [".$strSQL."]");
while($objResult = mysql_fetch_array($objQuery))
{
?>
<option value="<?=$objResult["code_amphoe"];?>">
<?=$objResult["name_amphoe"];?>
</option>
<?
}
?>
</select>

  <br />

  <label class="label" for="txttambon">ตำบล:&nbsp;</label>
  <select class="select" name="dll_tambon" id="dll_tambon">
  <??>
  <option>-&nbsp;เลือกตำบล&nbsp;-</option></select>
  <br />
<?
break;
case 1 :
?>

<label class="label" for="txtamphoe">อำเภอ:&nbsp;</label>
<select class="select" name="dll_amphoe" id="dll_amphoe">
<option selected value="<?=$_SESSION[code_amphoe];?>"><?=$_SESSION[amphoe_logoned];?></option>
</select>

  <br />

  <label class="label" for="txttambon">ตำบล:&nbsp;</label>
  <select class="select" name="dll_tambon" id="dll_tambon">
  <option>-&nbsp;เลือกตำบล&nbsp;-</option>
  <?
$strSQL = "SELECT * FROM tambon where code_amphoe = '$_SESSION[code_amphoe]' ORDER BY code_tambon ASC";
$objQuery = mysql_query($strSQL) or die ("Error Query [".$strSQL."]");
while($objResult = mysql_fetch_array($objQuery))
{
?>
<option value="<?=$objResult["code_tambon"];?>">
<?=$objResult["name_tambon"];?>
</option>
<?
}
?>
  </select>
  <br />
<?break;}?>
  <label class="label" for="txtaddress">ที่อยู่:&nbsp;</label>
  <textarea class="textarea" name="txtaddress" id="txtaddress" cols="45" rows="3"></textarea>
  <br />

  <label class="label" for="txttel">&nbsp;เบอร์โทรศัพท์:&nbsp;</label>
  <input name="txttel" type="text" class="input" id="txttel" onKeyUp="IsNumeric(this.value,this)" size="9" maxlength="9"/>
  <BR>

  <label class="label" for="txtfax">&nbsp;เบอร์โทรสาร:&nbsp;</label>
  <input name="txtfax" type="text" class="input" id="txtfax" onKeyUp="IsNumeric(this.value,this)" size="9" maxlength="9"/>
 <BR>
  <label class="label" for="txtemail">&nbsp;E-MAIL:&nbsp;</label>
  <input class="input" name="txtemail" type="text" id="txtemail" />
  </center>
	  </fieldset>
	
	</td>
  </tr>
  <tr>
    <td colspan="2" align="center"><input type="submit" name="Submit" value="ลงทะเบียน" class="button" style="cursor:hand;"/></td>
  </tr>
</form>