<!DOCTYPE html> <html> <body> <p>请点击“试一试”按钮,以执行 displayDate() 函数。</p> <button id="myBtn">试一试</button> <p id="demo"></p> <script> document.getElementById("myBtn").onclick = displayDate; function displayDate() { document.getElementById("demo").innerHTML = Date(); } </script> </body> </html>