源代码:
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Wfuyu教程(wfuyu.com)</title> </head> <body> <h1 id="header">旧标题</h1> <script> var element=document.getElementById("header"); element.innerHTML="新标题"; </script> <p>"旧标题" 被 "新标题" 取代。</p> </body> </html>
运行结果：