<form action="https://www.baidu.com" method="post" target="_blank"> <h3> 登录 </h3> <div> <label for="user_name">用户名</label> <input id="user_name" type='text' name="user_name" autofocus="" required=""><!-- 用户名表单 --> </div> <div> <button type='submit'>登录</button> </div> </form>