js实现表单验证

实现代码:

<!DOCTYPE html>
<html lang="en">
<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>
        window.onload = function () {
            //1.给表单绑定onsubmit事件
            document.getElementById("form").onsubmit = function () {
                //调用用户校验方法   chekUsername();
                //调用密码校验方法   chekPassword();
                //return checkUsername() && checkPassword();

                return checkUsername() && checkPassword();
            }

            //给用户名和密码框分别绑定离焦事件
            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 class="rg_layout">
    <div class="rg_left">
        <p>新用户注册</p>
        <p>USER REGISTER</p>

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

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

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

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

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

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

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

                    <tr>
                        <td class="td_left"><label for="checkcode">验证码</label></td>
                        <td class="td_right"><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 class="rg_right">
        <p>已有账号?<a href="#">立即登录</a></p>
    </div>

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

素材文件:
js实现表单验证
js实现表单验证
js实现表单验证

上一篇:CSS


下一篇:[原创]java WEB学习笔记97:Spring学习---Spring 中的 Bean 配置:IOC 和 DI