JavaScript练习 - 模态对话框

模态对话框练习

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        body{
            margin: 0;
        }
        .hide{
            display: none;
        }
        .a1{
        }
        .a2{
            position:fixed;
            left:0;
            top:0;
            right:0;
            bottom:0;
            background-color:black;
            opacity:0.6;
            z-index:9;
        }
        .a3{
            width:500px;
            height:400px;
            background-color:white;
            position:fixed;
            left:50%;
            top:50%;
            margin-left:-250px;
            margin-top:-200px;
            z-index:10;
        }
    </style>
</head>
<body>
    <div class="a1 ">
        <input type="button" value="按钮" onclick="f1()">
    </div>
    <div class="a2 hide"></div>
    <div class="a3 hide">
        <input type="button" value="按钮" onclick="f2()">
    </div>
<script src="jquery-1.12.4.min.js"></script>

<script>
    function f1() {
        $('.a2').removeClass('hide').parent().children('.a3').removeClass('hide');
    }
    function f2() {
        $('.a2').addClass('hide').parent().children('.a3').addClass('hide');
    }
</script>
</body>
</html>