<!DOCTYPE html>
<html>
<body>
<p>Press any key on the keyboard in the input field to get the location of the key.</p>
<input type="text" size="40" onkeydown="myFunction(event)">
<p>Possible return values:</p>
<ul>
<li>0 represents a standard key (like "A")</li>
<li>1 represents a left key (like the left CTRL key)</li>
<li>2 represents a right key (like the right CTRL key)</li>
<li>3 represents a key on the numeric keypad (like the number "2" on the right keyboard side)</li>
</ul>
<p><strong>Note:</strong> The location property is not supported in Safari or IE 8 and earlier versions.</p>
<p id="demo"></p>
<script>
function myFunction(event) {
var x = event.location;
document.getElementById("demo").innerHTML = "Key location: " + x;
}
</script>
</body>
</html>