PHPJquery点击按钮增添文本框

<meta http-equiv="Content-Type" content="text/html; charset=utf-8"><title>Jquery添加输入框</title><script type="text/javascript" src="js/jquery-2.1.1.min.js"></script><script type="text/javascript" src="js/jquery.json.min.js"></script>    <div id="input_list">    </div>    <input type="button" value="添加" onclick="addInput()">    <input type="button" value="确认" onclick="isOk()">        <hr>    

<meta http-equiv="Content-Type" content="text/html; charset=utf-8"><?php $json = $_REQUEST["json"];$arr=json_decode($json,true);?>