案例_表格全选和表单检验

案例_表格全选

(1)实现全选、全不选、反选按钮功能
(2)实现点击第一行按钮,会同时控制其余三行按钮
(3)实现鼠标移到哪一行,哪一行背景颜色变为红色

注意:
(1)先加载整个页面:onload = function () {}
(2)复选框 checkbox,选中和未选中靠属性checked控制

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>表格全选</title>
    <style>
        table{
            border:1px solid;
            margin: auto;
            width: 500px;
        }
        td,th{
            text-align: center;
            border: 1px solid;
        }
        div{
            margin-top: 15px;
            margin-left: 37% ;
        }
        .over{
            background: red;
        }
        .out{
            background: white;
        }
    </style>
    <script>
        /*
            全选:
                获取所有的checkbox
                遍历cb,设置每一个cb的状态为选中 checked
         */
        //在页面加载完后绑定事件
        window.onload = function () {
            //给全选按钮绑定单击事件
            document.getElementById("selectAll").onclick = function () {
                //全选:
                //获取所有的checkbox
                var cbs = document.getElementsByName("cb");
                //遍历
                for (var i = 0; i <cbs.length; i++) {
                    //设置每一个cb的状态为选中 checked
                    cbs[i].checked = true;
                }
            }
            //给全选按钮绑定单击事件
            document.getElementById("unSelectAll").onclick = function () {
                //全不选:
                //获取所有的checkbox
                var cbs = document.getElementsByName("cb");
                //遍历
                for (var i = 0; i <cbs.length; i++) {
                    //设置每一个cb的状态为未选中 checked
                    cbs[i].checked = false;
                }
            }

            document.getElementById("selectRev").onclick = function () {
                //反选:
                //获取所有的checkbox
                var cbs = document.getElementsByName("cb");
                //遍历
                for (var i = 0; i <cbs.length; i++) {
                    //设置每一个cb的状态为相反
                    cbs[i].checked = !cbs[i].checked;
                }
            }

            document.getElementById("firstTd").onclick = function () {
                //第一个cb点击:
                //获取所有的checkbox
                var cbs = document.getElementsByName("cb");
                //遍历
                for (var i = 0; i <cbs.length; i++) {
                    //设置每一个cb的状态和第一个cb的状态一样
                    cbs[i].checked = this.checked;
                }
            }

            //给所有tr绑定鼠标移到元素之上和移出元素事件
            var trs = document.getElementsByTagName("tr");
            //遍历
            for (var i = 0; i <trs.length; i++) {
                //移到元素之上
                trs[i].onmouseover = function () {
                    this.className = "over";
                }

                //移出元素事件
                trs[i].onmouseout = function () {
                    this.className = "out";
                }
            }
        }
        
    </script>
</head>
<body>
<table id="table">
    <caption>学生信息表</caption><!--caption 元素定义表格标题-->
    <tr>
        <td><input type="checkbox" name="cb" id="firstTd"></td>
        <th>编号</th>
        <th>姓名</th>
        <th>性别</th>
        <th>操作</th>
    </tr>
    <tr>
        <td><input type="checkbox" name="cb"></td>
        <td>1</td>
        <td>男1</td>
        <td></td>
        <td><a href="javascript:void(0);" >删除</a></td>
    </tr>
    <tr>
        <td><input type="checkbox" name="cb"></td>
        <td>2</td>
        <td>男2</td>
        <td></td>
        <td><a href="javascript:void(0);">删除</a></td>
    </tr>
    <tr>
        <td><input type="checkbox" name="cb"></td>
        <td>3</td>
        <td>男3</td>
        <td></td>
        <td><a href="javascript:void(0);" ;>删除</a></td>
    </tr>
</table>

<div>
    <input type="button" id="selectAll" value="全选">
    <input type="button" id="unSelectAll" value="全不选">
    <input type="button" id="selectRev" value="反选">
</div>

</body>
</html>

 

案例_表单检验

分析:

  1.给表单绑定onsubmit事件。监听器中判断每一个方法校验的结果。

    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.定义一些方法分别校验各个表单项。

  3.给各个表单项绑定onblur事件。

 

 

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>注册</title>
    <style>
        *{
            margin: 0px;
            padding: 0px;
            box-sizing: border-box;
        }
        body{
            background: url("img/a2.jpg") no-repeat center;background-size: 100% ;
            padding-top: 180px;
        }
        .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{
            /*border: 1px solid red;*/
            float: left;
            width: 530px;
        }

        .rg_right{
            /*border: 1px solid red;*/
            float: right;
            margin: 15px;
        }
        .rg_right > p:first-child{
            color: #A6A6A6;
            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;
            margin-left: 190px;
        }

        .error{
            color: red;
        }
    </style>


    <script>
        window.onload = function () {
            //给表单绑定onsubmit事件
            document.getElementById("form").onsubmit = function() {
                //调用用户名校验方法
                //调用密码校验方法
                return checkUsername() && checkPassword();
            }
            //给用户名和密码框分别绑定离开焦点事件
            document.getElementById("username").onblur = checkUsername;
            document.getElementById("password").onblur = checkPassword;
        }

        //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 = /^\w{6,12}$/;
            //判断值是否符合正则的规则
            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 width='35' height='26' src='img/qw1.png'/>"
            }else {
                //提示红色用户名错误
                s_username.innerHTML="用户名格式有误"
            }
            return flag;
        }

        //校验密码
        function checkPassword() {
            //获取用户名的值
            var password = document.getElementById("password").value;
            //定义正则表达式
            var reg_password = /^\w{6,12}$/;
            //判断值是否符合正则的规则
            var flag = reg_password.test(password);
            //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/qw1.png'/>"
            }else {
                //提示红色用户名错误
                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_from">
                <form action="#" id="form" method="post">
                    <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"><input type="radio" name="gender" value="female"></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" placeholder="请输入验证码">
                                <img id="img_check" src="img/verify_code.jpg">
                            </td>
                        </tr>
                        <tr>
                            <td colspan="2"><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>

 

 

posted @ 2022-08-04 15:10  魔光领域  阅读(35)  评论(0编辑  收藏  举报