編輯代碼:
查看結果 »
試一試 - ©
w3ii.com
<!DOCTYPE html> <html> <body> <head> <meta name="description" content="Free Web tutorials"> <meta name="keywords" content="HTML5,CSS,JavaScript"> <meta name="author" content="John Doe"> </head> <p>Click the button to change the value of the content attribute of the third meta element (index 2) in head.</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { document.getElementsByTagName("META")[2].content = "Bill Mosley"; document.getElementById("demo").innerHTML = "The content in meta name 'author' was changed from 'John Doe' to 'Bill Mosley'."; } </script> </body> </html>