【JS】利用函数判断平闰年

Osinghong2个月前 (04-07)成果展示138

<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>d24c04429</title>
		<meta name="viewport"
			content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
		
	</head>
	<body>
		<script>
			var year = prompt("请输入年份：");
			function years() {
				var ifyear = year % 4 == 0 && year % 100 != 0 || year % 400 == 0;
				var result;
				if (ifyear) {
					result = (year + "是闰年！");
				} else {
					result = (year + "不是闰年！");
				}
				return result;
			}
			alert(years());
		</script>
	</body>
</html>

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