<!DOCTYPE html>
<html>
<body>
<a href="demo_form.asp.html">
<img id="myImg" src="w3javascript.gif" alt="W3Schools.com" width="100" height="132" ismap>
</a>
<p>Click the button below to find out if the image is part of a server-side image-map (an image-map is an image with clickable areas).</p>
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
<script>
function myFunction() {
var x = document.getElementById("myImg").isMap;
document.getElementById("demo").innerHTML = x;
}
</script>
</body>
</html>