如图：

html代码

<tr> <th scope="row">奖励类型：</th> <td><input value="" type="text" name="item" id="reward" style="width: 60px;height: 20px;" placeholder="输入关键字" /> <select name="reward_id" id="reward_id"> <option value="">---请选择---</option> {foreach $reward as $value} <option value="{$value['material_id']}">{$value['material_name']}</option> {/foreach} </select> </td></tr>

JQuery代码

<script type="text/javascript"> $('#reward').bind('input propertychange', function() {reward();}); function reward() { var search = $("#reward").val(); $.ajax({ type:"get", url:"/mall/config_commodity_info/search_commodity_info", data:{search:search}, success:function(select){ var reward_id = $("#reward_id"); if (select) { $("option",reward_id).remove(); var obj = JSON.parse(select); for (var key in obj) { var option = "<option value='"+key+"'>"+obj[key]+"</option>"; reward_id.append(option); } } } }); } </script>

PHP代码

public function add_alms(){ $reward = $this->materials->selReward(); $this->assign('reward',$reward); return $this->fetch();}public function do_add_alms(){ $data = Request::instance()->param(); $this->alms->addAlms($data);}

以上这篇实时监控input框,实现输入框与下拉框联动的实例就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。