js判断年份 

<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        var year=prompt("请输入年份");
        if (year%4==0 && year%100!==0 ||year%400==0) {
            alert("闰年");
        }
        else {
            alert("平年");
        }
    </script>
</body>
</html>
posted @ 2020-10-26 13:26  无敌臭弟弟  阅读(645)  评论(0)  编辑  收藏  举报