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<!DOCTYPE html> <html> <head> <script> function clickCounter() { if(typeof(Storage) !== "undefined") { if (sessionStorage.clickcount) { sessionStorage.clickcount = Number(sessionStorage.clickcount)+1; } else { sessionStorage.clickcount = 1; } document.getElementById("result").innerHTML = "You have clicked the button " + sessionStorage.clickcount + " time(s) in this session."; } else { document.getElementById("result").innerHTML = "Sorry, your browser does not support web storage..."; } } </script> </head> <body> <p><button onclick="clickCounter()" type="button">点击我！</button></p> <div id="result"></div> <p>单击按钮来查看计数器增加。</p> <p>关闭浏览器选项卡（或窗口），然后重试，计数器将被重置。</p> </body> </html>