lovecoding
/
class


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <h1>三级页面</h1>
    <h3>我是第二个附页</h3>
    <button id="any">回到任意页</button>
    <script>
        var any = document.getElementById("any");
        any.onclick = function() {
            history.go(-2)
        }
    </script>
</body>
</html>