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<!DOCTYPE html> <html> <body> <p><a id="myAnchor" hreflang="en-us" href="../index.html">W3Schools</a></p> <p>Click the button to change the value of the hreflang attribute of the link to "fr".</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { document.getElementById("myAnchor").hreflang = "fr"; document.getElementById("demo").innerHTML = "The hreflang value of the link was changed from 'en-us' to 'fr'."; } </script> </body> </html>