<!DOCTYPE html>
<html>
<body>
<img src="planets.gif" width="145" height="126" usemap="#planetmap">
<map name="planetmap">
<area id="venus" shape="circle" coords="124,58,8" alt="Venus" href="../../www.example.com123@www.example.com/index.html">
</map>
<p>Click the button to change the username part of the href attribute for the "venus" area in the image-map.</p>
<button onclick="myFunction()">Try it</button>
<p><b>Note:</b> The username property is not supported in Internet Explorer, Safari and Opera version 12 (and earlier).</p>
<p id="demo"></p>
<script>
function myFunction() {
document.getElementById("venus").username = "newUsername";
document.getElementById("demo").innerHTML = "The username was changed from 'johnsmith' to 'newUsername'.";
}
</script>
</body>
</html>