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<html><body><h1>HTML DOM Events</h1><h2>The onplay Event</h2><p>Assign an "onplay" event to an audio element.</p><p>Press play.</p><audio controls onplay="myFunction()"> <source src="horse.ogg" type="audio/ogg"> <source src="horse.mp3" type="audio/mpeg"> Your browser does not support the audio element.</audio><p id="demo"></p><script>function myFunction() { document.getElementById("demo").innerHTML = "The audio has started to play";}</script></body></html>