<option value="1">主類</option>
<?php
foreach($rs as $k=>$v){
?>
<option value="<?php echo $v["hnc_id"];?>"><?php echo $v["hnc_name"];?></option>
<?php } ?>
<script type="text/javascript">
$(function(){
$("#hnc_pid").change(function(){
var $fid = $(this).val();
$.ajax({
type:"GET",
url:"selectson.php?fid="+$fid,
dataType:"html",
success:function(data){
$("#ht-sid").html(data);
}
})
})
})
</script>
</select>
<span id="ht-sid">
<select name="hnc_sid" >
<option value="-1">子類</option>
</select></span>
selectsson.php
<?php
include("..\inc\config.php");
include("..\inc\db.fun.php");
$fid=$_GET["fid"];
$sql="select * from hn_category where hnc_pid=".$fid;
$rs=fetchall($sql);
//print_r($rs);?>
<select name="hnc_sid">
<option value="-1">子類型</option>
<?php
foreach($rs as $k=>$v){
?>
<option value="<?php echo $v["hnc_id"] ?>"><?php echo $v["hnc_name"] ?></option>
<?php
}
?>
</select>