<html><body onpageshow="myFunction(event)"><h1>Hello World!</h1><p><b>注释：</b>Internet Explorer 10 及更早版本不支持 onpageshow 事件。</p><script>function myFunction(event) { if (event.persisted) { alert("The page was cached by the browser"); } else { alert("The page was NOT cached by the browser"); }}</script></body></html>