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<!DOCTYPE html> <html> <body> <video id="myVideo" width="320" height="240" controls> <source src="movie.mp4" type="video/mp4"> <source src="movie.ogg" type="video/ogg"> Your browser does not support the video tag. </video> <p>Click the buttons to get or set the volume of the video.</p> <button onclick="getVolume()" type="button">What is the volume?</button> <button onclick="setHalfVolume()" type="button">Set volume to 0.2</button> <button onclick="setFullVolume()" type="button">Set volume to 1.0</button> <script> var x = document.getElementById("myVideo"); function getVolume() { alert(x.volume); } function setHalfVolume() { x.volume = 0.2; } function setFullVolume() { x.volume = 1.0; } </script> </body> </html>