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<!DOCTYPE html> <html> <head> <link id="myLink" rel="stylesheet" type="text/css" media="screen" href="styles.css"> </head> <body> <h1>I am formatted with a linked style sheet</h1> <p>Click the button to change the media type the link element is intended for.</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { document.getElementById("myLink").media = "all"; document.getElementById("demo").innerHTML = "The media type was changed from 'screen' to 'all'."; } </script> </body> </html>