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<!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>