smarty + ajax 实现二级动态级联菜单

smarty + ajax 实现二级动态级联菜单 网上很多js实现的二级级联。下面是我的地区动态二级级联菜单数据表结构area_id mediumint(8)area_pid mediumint(8)area_name char(20)while ($rs = mysql_fetch_array($result)) { echo ‘<option class="must_input" value=‘.$rs[‘area_id‘].‘>&nbsp;‘.$rs[‘area_name‘].‘&nbsp;</option>‘; } mysql_close();}if ($rs[‘area_pid‘] == -1) $p_area_array[$rs[‘area_id‘]] = $rs[‘area_name‘]; else $area_array[$rs[‘area_id‘]] = $rs[‘area_name‘];}