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<html><body><p><a id="myAnchor" target="_blank" href="http://www.example.com:443/test.htm#part2">Example link</a></p><p>Click the button to change the port number of the link above.</p><p><b>Tip:</b> Open the link and look in the address bar before and after you have clicked the "Try it" button, to see the effect.</p><button onclick="myFunction()">Try it</button><p id="demo"></p><script>function myFunction() { document.getElementById("myAnchor").port = "80"; document.getElementById("demo").innerHTML = "The port number was changed to '80'.";}</script></body></html>