温馨提示×

温馨提示×

您好,登录后才能下订单哦!

密码登录×
登录注册×
其他方式登录
点击 登录注册 即表示同意《亿速云用户服务条款》

JavaScript如何实现用户名和密码表单校验功能

发布时间:2022-12-13 09:58:50 来源:亿速云 阅读:120 作者:iii 栏目:开发技术

这篇文章主要介绍“JavaScript如何实现用户名和密码表单校验功能”的相关知识,小编通过实际案例向大家展示操作过程,操作方法简单快捷,实用性强,希望这篇“JavaScript如何实现用户名和密码表单校验功能”文章能帮助大家解决问题。

代码如下:

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>注册页面</title>
    <style>
        *{
            margin: 0px;
            padding: 0px;
            box-sizing: border-box;
        }
        body{
            background: url("img/register_bg.png") no-repeat center;
            padding-top: 25px;
        }

        .rg_layout{
            width: 900px;
            height: 500px;
            border: 8px solid #EEEEEE;
            background-color: white;
            /*让div水平居中*/
            margin: auto;
        }

        .rg_left{
            /*border: 1px solid red;*/
            float: left;
            margin: 15px;
        }
        .rg_left > p:first-child{
            color:#FFD026;
            font-size: 20px;
        }

        .rg_left > p:last-child{
            color:#A6A6A6;
            font-size: 20px;

        }
        .rg_center{
            float: left;
            /* border: 1px solid red;*/

        }

        .rg_right{
            /*border: 1px solid red;*/
            float: right;
            margin: 15px;
        }

        .rg_right > p:first-child{
            font-size: 15px;

        }
        .rg_right p a {
            color:pink;
        }

        .td_left{
            width: 100px;
            text-align: right;
            height: 45px;
        }
        .td_right{
            padding-left: 50px ;
        }

        #username,#password,#email,#name,#tel,#birthday,#checkcode{
            width: 251px;
            height: 32px;
            border: 1px solid #A6A6A6 ;
            /*设置边框圆角*/
            border-radius: 5px;
            padding-left: 10px;
        }
        #checkcode{
            width: 110px;
        }

        #img_check{
            height: 32px;
            vertical-align: middle;
        }

        #btn_sub{
            width: 150px;
            height: 40px;
            background-color: #FFD026;
            border: 1px solid #FFD026 ;
        }
        .error {
            color: red;
        }
        #td_sub {
            padding-left: 150px;
        }

    </style>

    <script>
        //实现账户密码表单校验
        window.onload = function () {
            //给表单绑定onsubmit事件
            //也就是点击注册按钮就会验证用户名和密码是否正确
            document.getElementById("form").onsubmit = function () {
                //调用用户校验方法  checkUsername();
                //调用密码校验方法  checkPassword();
                return checkUsername() && checkPassword();
            }

            //给用户名和密码分别绑定离焦事件
            //当离焦时就会校验用户名和密码是否正确
            //注意这里的方法没有括号
            document.getElementById("username").onblur = checkUsername;
            document.getElementById("password").onblur = checkPassword;
        }

        //校验用户名
        function checkUsername() {
            //1、获取用户名的值
            var username = document.getElementById("username").value;
            //2、定义正则表达式
            var reg_username = /^w{6,12}$/;
            //3、判断值是否符合正则的规则
            var flag = reg_username.test(username);
            //4、提示信息
            var s_username = document.getElementById("s_username");

            if (flag) {
                //提示绿色对勾
                s_username.innerHTML = "<img width="35" height="25" src="img/gou.png" />";
            } else {
                //提示红色用户名有误
                s_username.innerHTML = "用户名格式有误";
            }
            return flag;
        }

        //校验密码
        function checkPassword() {
            //1、获取用户名的值
            var password = document.getElementById("password").value;
            //2、定义正则表达式
            var reg_password = /^w{6,12}$/;
            //3、判断值是否符合正则的规则
            var flag = reg_password.test(password);
            //4、提示信息
            var s_password = document.getElementById("s_password");

            if (flag) {
                //提示绿色对勾
                s_password.innerHTML = "<img width="35" height="25" src="img/gou.png" />";
            } else {
                //提示红色用户名有误
                s_password.innerHTML = "密码格式有误";
            }
            return flag;
        }


    </script>
</head>
<body>

<div>
    <div>
        <p>新用户注册</p>
        <p>USER REGISTER</p>

    </div>

    <div>
        <div>
            <!--定义表单 form-->
            <form action="#" id="form" method="get">
                <table>
                    <tr>
                        <td><label for="username">用户名</label></td>
                        <td>
                            <input type="text" name="username" id="username" placeholder="请输入用户名">
                            <span id="s_username"></span>
                        </td>
                    </tr>

                    <tr>
                        <td><label for="password">密码</label></td>
                        <td>
                            <input type="password" name="password" id="password" placeholder="请输入密码">
                            <span id="s_password"></span>
                        </td>
                    </tr>

                    <tr>
                        <td><label for="email">Email</label></td>
                        <td><input type="email" name="email" id="email" placeholder="请输入邮箱"></td>
                    </tr>

                    <tr>
                        <td><label for="name">姓名</label></td>
                        <td><input type="text" name="name" id="name" placeholder="请输入姓名"></td>
                    </tr>

                    <tr>
                        <td><label for="tel">手机号</label></td>
                        <td><input type="text" name="tel" id="tel" placeholder="请输入手机号"></td>
                    </tr>

                    <tr>
                        <td><label>性别</label></td>
                        <td>
                            <input type="radio" name="gender" value="male"> 男
                            <input type="radio" name="gender" value="female"> 女
                        </td>
                    </tr>

                    <tr>
                        <td><label for="birthday">出生日期</label></td>
                        <td><input type="date" name="birthday" id="birthday" placeholder="请输入出生日期"></td>
                    </tr>

                    <tr>
                        <td><label for="checkcode" >验证码</label></td>
                        <td><input type="text" name="checkcode" id="checkcode" placeholder="请输入验证码">
                            <img id="img_check" src="img/verify_code.jpg">
                        </td>
                    </tr>

                    <tr>
                        <td colspan="2" id="td_sub"><input type="submit" id="btn_sub" value="注册"></td>
                    </tr>
                </table>

            </form>

        </div>

    </div>

    <div>
        <p>已有账号?<a href="#"  >立即登录</a></p>
    </div>

</div>
</body>
</html>

关于“JavaScript如何实现用户名和密码表单校验功能”的内容就介绍到这里了,感谢大家的阅读。如果想了解更多行业相关的知识,可以关注亿速云行业资讯频道,小编每天都会为大家更新不同的知识点。

向AI问一下细节

免责声明:本站发布的内容(图片、视频和文字)以原创、转载和分享为主,文章观点不代表本网站立场,如果涉及侵权请联系站长邮箱:is@yisu.com进行举报,并提供相关证据,一经查实,将立刻删除涉嫌侵权内容。

AI