<!DOCTYPE html> <html> <body> <h1>Element 对象</h1> <h2>innerHTML 属性</h2> <p id="demo" onclick="myFunction()">单击我可更改我的 HTML 内容 (innerHTML)。</p> <script> function myFunction() { document.getElementById("demo").innerHTML = "I have changed!"; } </script> </body> </html>