jquery注册页面的密码长度,确认密码匹配,email格式设定

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>

<html>
<head>
<meta charset="utf-8">
<title>输入信息检验title>
<script src="js/jquery-3.2.1.js">script>
<script>
$.validator.setDefaults({
    submitHandler: function() {
      alert("提交事件!");
    }
});
$().ready(function() {
// 在键盘按下并释放及提交后验证提交表单
  $("#signupForm").validate({
        rules: {
         username: {
            required: true,
            minlength: 2
          },
          password: {
            required: true,
            minlength: 6,
            maxlength: 20,
          },
          confirm_password: {
            required: true,
            minlength: 6,
            maxlength: 20,
            equalTo: "#password"
          },
          email: {
            required: true,
            email: true
          },
        },
        messages: {
          username: {
            required: "请输入用户名",
            minlength: "用户名必需由两个字母组成"
          },
          password: {
            required: "请输入密码",
            minlength: "密码长度不能小于 6 个字母",
            maxlength: "密码长度不能多于 20 个字母",
          },
          confirm_password: {
            required: "请输入密码",
            minlength: "密码长度不能小于 6 个字母",
            maxlength: "密码长度不能多于 20 个字母",
            equalTo: "两次密码输入不一致"
          },
          email: "请输入一个正确的邮箱",
        }
    });
});
script>
<style>
.error{
    color:red;
}
style>
head>
<body>
<form class="cmxform" id="signupForm" method="get" action="">
  <fieldset>
    <legend>验证完整的表单legend>
    <p>
      <label for="username">用户名label>
      <input id="username" name="username" type="text">
    p>
    <p>
      <label for="password">密码label>
      <input id="password" name="password" type="password">
    p>
    <p>
      <label for="confirm_password">验证密码label>
      <input id="confirm_password" name="confirm_password" type="password">
    p>
    <p>
      <label for="email">Emaillabel>
      <input id="email" name="email" type="email">
    p>
    <p>
      <input class="submit" type="submit" value="提交">
    p>
  fieldset>
form>
body>
html>

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