<title>
预约表单
</title>
<h2>
预约表单
</h2>
<form action="submit_appointment" method="post">
<label for="name">姓名:</label><input type="text" id="name" name="name" required=""/><br/><br/><label for="email">电子邮件:</label><input type="email" id="email" name="email" required=""/><br/><br/><input type="submit" value="提交预约"/>
</form><!--!doctype-->
你好,请问哪里失效了呢?