使用javascript数组从PHP / MySQL填充选择菜单

I have this code:

我有这个代码:

<script>
var values = <?php
$sql="SELECT * FROM billing_sagenominalcodes order by code ASC";
$rs=mysql_query($sql,$conn) or die(mysql_error());
$nominalcodes = array();
while($result=mysql_fetch_assoc($rs))
{
    $nominalcodes[] = $result['code'];
}
echo json_encode($nominalcodes);
?>;
</script>

<select name="sagenominalcode" id="sagenominalcode">
<script>addOptions(document.getElementById('sagenominalcode'), values);</script>
</select>
<script>
var valu