<!DOCTYPE html>
<html>
<body>
<p>The removeEventListener() method is not supported Internet Explorer 8 and earlier versions.</p>
<p>This example demonstrates a solution that will work for all browsers.</p>
<p>This document has an onmousemove event handler attached with the addEventListener() method, that displays a random number every time you move your mouse in this document.</p>
<p>Click the button to remove the event handler.</p>
<button onclick="removeHandler()" id="myBtn">Try it</button>
<p id="demo"></p>
<script>
if (document.addEventListener) {
document.addEventListener("mousemove", myFunction);
} else if (document.attachEvent) {
document.attachEvent("onmousemove", myFunction);
}
function myFunction() {
document.getElementById("demo").innerHTML = Math.random();
}
function removeHandler() {
if (document.removeEventListener) {
document.removeEventListener("mousemove", myFunction);
} else if (document.detachEvent) {
document.detachEvent("onmousemove", myFunction);
}
}
</script>
</body>
</html>