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  • JS对注册页面进行表单校验

    页面效果

    校验效果：

    FormCheck.html

    <!DOCTYPE html>
< html lang="en">
  <head>
    <meta charset="UTF-8">
    <title>注册页面表单校验</title>
    <link rel="stylesheet" href="../css/register.css">

  </head>
  <body>

    <div class="reg_back">
        <div class="reg_left">
            <p>新用户注册</p>
            <p>USER REGISTER</p>
        </div>
        <div class="reg_center">
            <div class="reg_form">
                <form action="#" method="post" id="form">
                    <table>
                        <tr>
                            <td class="td_left"><label for="username">用户名</label></td>
                            <td class="td_right"><input type="text" name="username" placeholder="请输入用户名(英文字符或数字)"
                                                        id="username">
                                <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" placeholder="请输入密码（长度在6~12位之间）"
                                                        id="password">
                                <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" placeholder="请输入Email" id="Email">
                                <span id="s_email" class="error"></span>
                            </td>
                        </tr>
                        <tr>
                            <td class="td_left"><label for="rename">姓名</label></td>
                            <td class="td_right"><input type="text" name="rename" placeholder="请输入真实姓名（中文姓名）" id="rename">
                                <span id="s_rename" class="error"></span>
                            </td>
                        </tr>
                        <tr>
                            <td class="td_left"><label for="Telphone">手机号</label></td>
                            <td class="td_right"><input type="text" name="telphone" placeholder="请输入您的手机号"
                                                        id="Telphone">
                                <span id="s_telphone" class="error"></span>
                            </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"></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">
                                <img src="../image/10.png" id="img_check"></td>
                            <!--10.png为验证码图片-->

                        </tr>
                        <tr>
                            <td colspan="2" id="td_sub"><input type="submit" value="注册" id="btn_sub"></td>
                        </tr>
                    </table>
                </form>
            </div>
        </div>
        <div class="reg_right">
            <p>已有账号?<a href="#">立即登录</a></p>

        </div>
    </div>
    <script src="../js2/FormCheck.js"></script>
 </body>
</ html>

    Register.css

        * {
    margin: 0px;
    padding: 0px;
    box-sizing: border-box;
}

body {
    background: url("../image/9.jpg") no-repeat center;
    /*设置图片适应整个页面*/
    background-size: 100% 100%;
    background-attachment:fixed;
}

.reg_back {
    /*设置整体的尺寸、背景色、边距等*/
     900px;
    height: 400px;
    border: 8px solid #eeeeee;
    background: white;
    margin: auto;
    margin-top: 20px;
}

.reg_left {
    /*设置左浮动和外边距*/
    float: left;
    margin: 10px;
}

.reg_left > p:first-child {
    /*设置段落（新用户注册）颜色和字体大小*/
    color: yellow;
    font-size: 20px;
}

.reg_left > p:last-child {
    /*设置段落（USER REGISTER）颜色和字体大小*/
    color: #A6A6A6;
    font-size: 20px;
}

.reg_center {
    /*设置中间的各种输入框等*/
    float: left;
     500px;
}

.reg_right {
    /*设置右边段落浮动和外间距*/
    float: right;
    margin: 30px;
}

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

.reg_right p a {
    /*设置超链接（立即登录）颜色*/
    color: crimson;
}

.td_left {
    /*设置表单中字体对齐方式和宽度、高度*/
     100px;
    text-align: right;
    height: 40px;
}

.td_right {
    /*设置输入框内边距*/
    padding-left: 40px;
}

#username ,#password,#Email, #rename ,#Telphone,#Birthday,#checkcode{
    /*设置输入框大小和边框*/
     220px;
    height: 30px;
    border: 1px solid #A4A4A4;
    /* 设置边框为圆角 */
    border-radius: 8px;
    padding-left: 10px;
}
#checkcode{
    /*验证码宽度*/
     120px;
}
#img_check{
    /*验证码图片*/
    vertical-align: middle;
    height: 30px;
     95px;
}
#btn_sub{
    /*注册按钮*/
    background: lime;
     100px;
    height: 40px;
    border: 1px solid lime ;
}
.error{
    color:red;
}
#td_sub{
    padding-left: 150px;
}

    FormCheck.js

        window.onload = function () {
    //给表单绑定onsubmit事件
    document.getElementById("form").onsubmit = function () {
        return checkUsername() && checkPassword() &&checkEmail() && checkRename() && checkTelphone();
    }

    //给用户名和密码框、Email、姓名、手机号分别绑定离焦事件
    document.getElementById("username").onblur = checkUsername;
    document.getElementById("password").onblur = checkPassword;
    document.getElementById("Email").onblur = checkEmail;
    document.getElementById("rename").onblur = checkRename;
    document.getElementById("Telphone").onblur = checkTelphone;
}

//校验用户名
function checkUsername() {
    //获取用户名的值
    var username = document.getElementById("username").value;

    //定义正则表达式
    var reg_username = /^([a-zA-Z0-9_-])/;
    //判断值是否符合正则表达式的规则
    var flag = reg_username.test(username);

    //提示信息
    var s_username = document.getElementById("s_username");

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

//校验密码
function checkPassword(){
    //1.获取密码的值
    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='../image/gou.png'/>";
    }else{
        //提示红色错误信息
        s_password.innerHTML = "密码格式有误";
    }
    return flag;
}
//校验Email
function checkEmail(){
    //1.获取Email的值
    var email = document.getElementById("Email").value;
    //2.定义正则表达式
    var reg_email = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(.[a-zA-Z0-9_-])+/;
    //3.判断值是否符合正则的规则
    var flag = reg_email.test(email);
    //4.提示信息
    var s_email = document.getElementById("s_email");

    if(flag){
        //提示绿色对勾
        s_email.innerHTML = "<img width='35' height='25' src='../image/gou.png'/>";
    }else{
        //提示红色错误信息
        s_email.innerHTML = "Email格式有误";
    }
    return flag;
}
//校验真实姓名
function checkRename(){
    //1.获取真实姓名的值
    var rename = document.getElementById("rename").value;
    //2.定义正则表达式
    var reg_rename = /^[u4e00-u9fa5]{2,4}$/;
    //3.判断值是否符合正则的规则
    var flag = reg_rename.test(rename);
    //4.提示信息
    var s_rename = document.getElementById("s_rename");

    if(flag){
        //提示绿色对勾
        s_rename.innerHTML = "<img width='35' height='25' src='../image/gou.png'/>";
    }else{
        //提示红色错误信息
        s_rename.innerHTML = "真实姓名输入有误";
    }
    return flag;
}
//校验手机号
function checkTelphone(){
    //1.获取手机号的值
    var telphone = document.getElementById("Telphone").value;
    //2.定义正则表达式
    var reg_telphone = /^(((13[0-9]{1})|(15[0-9]{1})|(18[0-9]{1}))+d{8})$/;
    //3.判断值是否符合正则的规则
    var flag = reg_telphone.test(telphone);
    //4.提示信息
    var s_telphone = document.getElementById("s_telphone");

    if(flag){
        //提示绿色对勾
        s_telphone.innerHTML = "<img width='35' height='25' src='../image/gou.png'/>";
    }else{
        //提示红色错误信息
        s_telphone.innerHTML = "手机号输入有误";
    }
    return flag;
}

    背景图片

    验证码图片
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  • 原文地址：https://www.cnblogs.com/gujun1998/p/11321589.html
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