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<!DOCTYPE html> <html> <body> <a id="myAnchor">A Link: Go to w3schools.com</a> <p>Click the button to create a "class" attribute with the value "www.w3ii.com" and insert it to the a element above.</p> <button onclick="myFunction()">Try it</button> <script> function myFunction() { var anchor = document.getElementById("myAnchor"); var att = document.createAttribute("href"); att.value = "http://www.w3ii.com"; anchor.setAttributeNode(att); } </script> </body> </html>