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w3ii.com
<!DOCTYPE html> <html> <body> <p><a id="myAnchor" href="../../www.microsoft.com/index.html">www.microsoft.com</a></p> <p>Click the button to change the value of the href attribute of the link above to "www.cnn.com".</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { document.getElementById("myAnchor").href = "http://www.cnn.com/"; document.getElementById("demo").innerHTML = "The link above now goes to www.cnn.com."; } </script> </body> </html>