เลือก listbox แล้วแสดง textbox ที่ซ่อนอยู่ โดยที่ listbox เป็นข้อมูลอยู่ใน database

<script language="javascript">
function on_change(){         
if( document.getElementById('value').value='none'){           
document.getElementById('value').style.display="";          
}else{document.getElementById('price_card').style.display=="LOXCard0";}
}
 </script>
 
  <script language = "JavaScript">
//**** List card (Start) ***//
function ListAmphur(SelectValue)
{
frmMain.price_card.length = 0
//*** Insert null Default Value ***//
var myOption = new Option('','') 
frmMain.price_card.options[frmMain.price_card.length]= myOption

<?
$intRows = 0;
$strSQL = "SELECT * FROM card order by price 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 = <?=$objResult["idmvno"];?>;
strValue = "<?=$objResult["price"];?>";
strItem = "<?=$objResult["price"];?>";
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.price_card.options[frmMain.price_card.length]= myOption                  
}
<?
}
?>                                                                  
}
//**** List card (End) ***//
</script>
<td width="156"><input name="value" type="text" id="value" style="display:none;" onchange = "check_data()" value="<?=$row_show['value']?>" /></td>