<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>注册</title>
</head>
<body>
<div class="divAll">
<div id="titles">新用户注册</div>
<div id="contents">
<h3>基本信息</h3>
<hr width="95%" color="#f2f2f2"/>
<form action="#" onsubmit="return checkForm">
<div id="form-itemGroup">
<label for="userName">用户名：</label>
<input type="text" id="userName" class="userName" onBlur="checkUserName()" oninput="checkUserName()">
<span class="default" id="nameErr">请输入3位用户名</span>
<div>
<div id="form-itemGroup">
<label for="userPassword">密 码：</label>
<input type="password" id="userPassword" class="userName" onBlur="checkPassword()" oninput="checkPassword()">
<span class="default" id="passwordErr">请输入4到8位的密码</span>
<div>
<div id="form-itemGroup">
<label for="userConfirmPassword">确认密码：</label>
<input type="password" id="userConfirmPassword" class="userName" onBlur="ConfirmPassword()" oninput="ConfirmPassword()">
<span class="default" id="ConPasswordErr">请再次输入密码</span>
<div>
<div>
<button type="submit" class="divBtn">注册</button>
</div>
</form>
</div>
</div>
</body>
</html>
原文地址：https://www.cnblogs.com/xichen25/p/9657938.html