JavaScript案例-表单验证

JavaScript表单验证案例

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("gou.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 {
            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;

        }

        .rg_right {
            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;
        }

        #td_sub{
            padding-left: 150px;
        }

        .error{
            color:red;
            vertical-align: middle;
        }
    </style>
<script>
    //定义加载事件
    window.onload = function () {
        //定义表单提交事件
        document.getElementById("btn_sub").onsubmit = function () {
            //如果用户名/密码/Email的校验结果都为true那么表单就可以提交
            return thisUserName() && thisPassWold() && thisEmail();
        };
        //绑定离焦事件
        //当文本框失去焦点就对文本框中的内容进行校验
        document.getElementById("username").onblur = thisUserName;
        document.getElementById("password").onblur = thisPassWold;
        document.getElementById("email").onblur = thisEmail;
    };
    //校验用户名
    function thisUserName(){
        var username = document.getElementById("username").value;
        var elementById = document.getElementById("s_username");
        //定义泛型
        var generic_username = /^\w{6,12}$/;
        //校验文本框输入的数据是否符合，根据校验的结果向对应的span标签中添加一个标签体，并将校验结果返回
        var temp = username.match(generic_username);
        if (temp) {
            elementById.innerHTML = "<img src='gou.png' width='35' height='25'/>"
        }else {
            elementById.innerHTML = "输入格式有误！"
        }
        return temp;
    }

    //校验密码
    function thisPassWold(){
        var username = document.getElementById("password").value;
        var elementById = document.getElementById("s_password");
        //定义泛型
        var generic_password = /^\w{6,12}$/;
        //校验文本框输入的数据是否符合，根据校验的结果向对应的span标签中添加一个标签体，并将校验结果返回
        var temp = username.match(generic_password);
        if (temp) {
            elementById.innerHTML = "<img src='gou.png' width='35' height='25'/>"
        }else {
            elementById.innerHTML = "输入格式有误！"
        }
        return temp;
    }
    //校验Email
    function thisEmail(){
        var email = document.getElementById("email").value;
        var s_email = document.getElementById("s_email");
        //定义泛型
        var reg = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(.[a-zA-Z0-9_-])+/;
        //校验文本框输入的数据是否符合，根据校验的结果向对应的span标签中添加一个标签体，并将校验结果返回
        var temp = email.match(reg);
        if (temp) {
            s_email.innerHTML = "<img src='gou.png' width='35' height='25'/>";
        } else {
            s_email.innerHTML = "输入格式有误！";
        }
        return temp;
    };
</script>
</head>
<body style="background-image: url(long.jpg)">

<div class="rg_layout">
    <div class="rg_left">
        <!--
            html代码
        -->
        <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">
                            <span id="s_email" class="error"></span>
                        </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"> 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="timg.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>