HTML - onplaying attribute in html - tutorial

Code

<!DOCTYPE html>
<html>
   <head>
   <title>html tutorial - html5 - html code - html form - In 30Sec by Microsoft Award MVP - | wikitechy HTML onplaying attribute</title>
   <base href="../tryit/">
   <body>
   <h1><span>html tutorial - </span> Wikitechy HTML onplaying attribute<span> - html5 - html code - html form</span></h1>
   <audio controls onplaying="onPlaying()">
   <source src="welcome.wav" type="audio/wav">
   <source src="welcome.mp3" type="audio/mp3">
   </audio>
   <script>
   function onPlaying() {
   alert("The wikitechy audio have started playing!");
   }
   </script>
   </body>
</html>

Result