Java教程

5.表单效验

本文主要是介绍5.表单效验，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！

表单效验

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

    body {
        background: url("../img/verify_code.jpg") 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;
    }

    #td_sub{
        padding-left: 150px;
    }

    .error{
        color:red;
        vertical-align: middle;
    }
</style>
<script>
    /*
    分析
    1.给表单绑定onsubmit事件。监听器判断每一个方法效验的结果
            如果都为true，则监听器方法返回true
            如果有一个为false则监听器方法返回false
    2.定义一些方法分别效验表单项
    3.给各个表单项绑定onclick事件
     */
    window.onload = function () {
    //1.给表单绑定submit事件
        document.getElementById("form").onsubmit = function () {
    //调用用户效验方法
    //调用密码效验方法
            return checkUsername() && checkPassword();
        }
        //给用户名和密码框绑定离焦事件
        document.getElementById("username").onblur = checkUsername;
        document.getElementById("password").onblur = checkPassword;
    }
    //效验用户名
    function checkUsername(){
        var username = document.getElementById("username").value;
        var reg_username = /^\w{6,12}$/;
        var flag = reg_username.test(username);
        var s_username = document.getElementById("s_username");
        if(flag){
            s_username.innerHTML = "<img height='25' width='35' src='../img/gou.png'>"
        }else{
            s_username.innerHTML = "用户名格式有误";
        }
        return flag;
    }

    function checkPassword(){
        var password = document.getElementById("password").value;
        var reg_password = /^\w{6,12}$/;
        var flag = reg_password.test(password);
        var s_password = document.getElementById("s_password");
        if(flag){
            s_password.innerHTML = "<img height='25' width='35' src='../img/gou.png'>"
        }else{
            s_password.innerHTML = "密码格式有误";
        }
        return flag;
    }
</script>
<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"> 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>
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