<html>
<head>
<script>
function whichButton(event)
{
alert(event.keyCode);
}
</script>
</head>
<body onkeyup="whichButton(event)">
<p><b>Note:</b> Make sure the right frame has focus when trying this example!</p>
<p>Press a key on your keyboard. An alert box will alert the keycode of the key.</p>
</body>
</html>