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<html><body><h1>HTML DOM Events</h1><h2>The onmousedown Event</h2><div onmousedown="WhichButton(event)">Click this text (with one of your mouse-buttons)<p>0 Specifies the left mouse-button<br>1 Specifies the middle mouse-button<br>2 Specifies the right mouse-button</p></div><div id="demo"></div><script>function WhichButton(event) { document.getElementById("demo").innerHTML = "You pressed button: " + event.button;}</script></body></html>