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<!DOCTYPE html>
<html>
<body>
<h1>Change filter with JavaScript</h1>
<p>Click the button to change the color of the image to 100% grayscale.</p>
<button onclick="myFunction()">Try it</button><br><br>
<img id="myImg" src="pineapple.jpg" alt="Pineapple" width="300" height="300">
<script>
function myFunction() {
  document.getElementById("myImg").style.filter = "grayscale(100%)";
}
</script>
</body>
</html>