编辑代码:
查看结果 »
试一试 - ©
w3ii.com
<!DOCTYPE html> <html> <body> <p>Click the button to change the text of this paragraph.</p> <p>This is also a paragraph.</p> <button onclick="myFunction()">Try it</button> <script> function myFunction() { document.getElementsByTagName("P")[0].innerHTML = "Hello World!"; } </script> </body> </html>