09.【JavaScript综合案例】

案例一：电灯开关

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>电灯开关</title>
</head>
<body>
    <img id="light" src="img/off.gif">

    <script >
        var light = document.getElementById("light");

        var  flag = false;

        light.onclick = function() {
            if(flag) {
                light.src = "img/off.gif";
                flag = false;
            } else {
                light.src = "img/on.gif";
                flag = true;
            }
        }
    </script>
</body>
</html>

案例二：常见事件

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>常见事件</title>
</head>
<body>

<!--
    function fun(){
       return  checkForm();
    }

 -->
<form action="#" id="form" onsubmit="return checkForm();">
    <input type="text" name="username" id="username">

    <select id="city" name="city">
        <option>--请选择--</option>
        <option>北京</option>
        <option>上海</option>
        <option>西安</option>
    </select>
    <input type="submit" value="提交">
</form>

<script>

    // 2. 加载完成事件
    window.onload = function () {
        // 1. 失去焦点事件
        /*document.getElementById("username").onblur = function () {
            alert("失去焦点了~~");
        }*/

        // 2. 鼠标移动到元素之上
        /*document.getElementById("username").onmouseover = function () {
            alert("鼠标来了~~~");
            alert(event.button);
        }*/

        // 3. 鼠标和键盘事件
        /*document.getElementById("username").onkeyup = function (event) {
                // alert(event.keyCode);
                if(event.keyCode === 13) {
                    alert("提交表单，登陆成功");
                }
        }*/

        // 4. onchange事件
        /*document.getElementById("city").οnchange= function () {
            alert("改变了···");
        }*/


        // 5. onsubmit事件
        /*document.getElementById("form").οnsubmit= function () {
            // 校验用户名格式
            var flag = true;

            return flag;
        }*/
    }
    // 5
    function checkForm() {
        return false;
    }
</script>
</body>
</html>

案例三：表格全选

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>表格全选</title>
    <style>
        table{
            border: 1px solid;
            width: 500px;
            margin-left: 30%;
        }

        td,th{
            text-align: center;
            border: 1px solid;
        }
        div{
            margin-top: 10px;
            margin-left: 30%;
        }

        .out{
            background-color: white;
        }
        .over{
            background-color: pink;
        }
    </style>

  <script>
      /*
        分析：
            1.全选：
                * 获取所有的checkbox
                * 遍历checkbox，设置每一个checkbox的状态为选中  checked

       */


      //1.在页面加载完后绑定事件
      window.onload = function(){
          //2.给全选按钮绑定单击事件
          document.getElementById("selectAll").onclick = function(){
                //全选
                //1.获取所有的checkbox
                var cbs = document.getElementsByName("cb");
                //2.遍历
                  for (var i = 0; i < cbs.length; i++) {
                      //3.设置每一个cb的状态为选中  checked
                      cbs[i].checked = true;
                  }
          }

          document.getElementById("unSelectAll").onclick = function(){
              //全不选
              //1.获取所有的checkbox
              var cbs = document.getElementsByName("cb");
              //2.遍历
              for (var i = 0; i < cbs.length; i++) {
                  //3.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
              //1.获取所有的checkbox
              var cbs = document.getElementsByName("cb");
              //2.遍历
              for (var i = 0; i < cbs.length; i++) {
                  //3.设置每一个cb的状态为相反
                  cbs[i].checked = !cbs[i].checked;
              }
          }

          document.getElementById("firstCb").onclick = function(){
              //第一个cb点击
              //1.获取所有的checkbox
              var cbs = document.getElementsByName("cb");
              //获取第一个cb

              //2.遍历
              for (var i = 0; i < cbs.length; i++) {
                  //3.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");
          //2.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
              trs[i].onmouseout = function(){
                     this.className = "out";
              }

          }

      }



  </script>

</head>
<body>

<table>
    <caption>学生信息表</caption>
    <tr>
        <th><input type="checkbox" name="cb" id="firstCb"></th>
        <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>令狐冲</td>
        <td>男</td>
        <td><a href="javascript:void(0);">删除</a></td>
    </tr>

    <tr>
        <td><input type="checkbox"  name="cb" ></td>
        <td>2</td>
        <td>任我行</td>
        <td>男</td>
        <td><a href="javascript:void(0);">删除</a></td>
    </tr>

    <tr>
        <td><input type="checkbox"  name="cb" ></td>
        <td>3</td>
        <td>岳不群</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>

案例四：表单验证

<!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>

    /*
        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。



     */

    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() && checkEmail();
        }

        //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;
        document.getElementById("email").onblur = checkEmail;
    }

    //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;
    }

    //校验邮箱
    function checkEmail(){
        //1.获取用户名的值
        var email = document.getElementById("email").value;
        //2.定义正则表达式
        var reg_email = /^\w{6,12}$/;
        //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");
        // alert(s_email);
        if(flag){
            //提示绿色对勾
            s_email.innerHTML = "<img width='35' height='25' src='img/gou.png'/>";
        }else{
            //提示红色邮箱有误
            s_email.innerHTML = "邮箱格式有误";
        }
        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">
                            <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" 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>

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09.【JavaScript综合案例】

案例一：电灯开关

案例二：常见事件

案例三：表格全选

案例四：表单验证

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