ช่วยดูหน่อยครับว่า code ผิดตรงไหนอ่ะครับ การสร้าง Dependent ListMenu

<script language = "JavaScript">

		function ListSubOffice(SelectValue)
		{
			form1.s_office_id.length = 0
			
			
			var myOption = new Option('กรุณาเลือกสำนักงานย่อย','0')  
			form1.s_office_id.options[form1.s_office_id.length]= myOption
			
			<?
			$intRows = 0;
			$strSQL = "SELECT * FROM s_office ORDER BY s_office_id 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 = <?=$objResult["office_id"];?>;
				strValue = "<?=$objResult["s_office_id"];?>";
				strItem = "<?=$objResult["s_office_n"];?>";
				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])  
					form1.s_office_id.options[form1.s_office_id.length]= myOption
				}
			<?
			}
			?>																	
		}
</script>

<select name="office_id" id="office_id" style="width:305px"  onChange = "ListSubOffice(this.value)">
    	<option value="0">กรุณาเลือกหน่วยงาน</option>
        
<?php
	if($event=="edit")
	{
		$rss=mysql_query("select * from office o,s_office s,w_lot w where o.office_id=s.office_id and s.s_office_id=w.s_office_id and w.w_lot_id='$wood_id'");
		$results=mysql_fetch_array($rss);	
	}
	else
	{
		$rss=mysql_query("select * from s_office where s_office_id='$s_off_id'");
		$results=mysql_fetch_array($rss);
	}
	
	$rs=mysql_query("select * from office order by office_id");
	while($result=mysql_fetch_array($rs)){
?>
<option value="<?=$result[office_id]?>" <?php if($result[office_id] == $results[office_id]) echo "selected"; ?>>
<?=$result[office_n]?></option>
<?php
	}
	mysql_free_result($rs);
?>
    </select>


<select name="s_office_id" id="s_office_id" style="width:305px">
    	<option value="0">กรุณาเลือกสำนักงานย่อย</option>