<!DOCTYPE html>
<html>
<body onmousedown="isKeyPressed(event)">
<p>Click somewhere in the document. An alert box will tell you if the META key was pressed when the onmousedown event occured.</p>
<p><strong>Tip:</strong> Try to press and hold down the META key (if it is available on your keyboard) before you click in the document.</p>
<script>
function isKeyPressed(event) {
if (event.metaKey) {
alert("The META key was pressed!");
} else {
alert("The META key was NOT pressed!");
}
}
</script>
</body>
</html>