<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<meta name="renderer" content="webkit|ie-comp|ie-stand">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no" />
<meta http-equiv="Cache-Control" content="no-siteapp" />
<!--[if lt IE 9]>
<script type="text/javascript";
<div class="loginWraper">
<div id="loginform" class="loginBox">
<form class="form form-horizontal" action="index.html" method="post">
<div class="row cl">
<label class="form-label col-xs-3"><i class="Hui-iconfont"></i></label>
<div class="formControls col-xs-8">
&;
</div>
<div class="row cl">
<div class="formControls col-xs-8 col-xs-offset-3">
<input name="" type="button" id="login" class="btn btn-success radius size-L" value=" 登 录 ">
</div>
</div>
</form>
</di
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
When submitting ajax using post, there is one parameter that is not written.