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<html> <body> <p>Can my browser play MP4 videos? <span><button onclick="supportType(event,'video/mp4','avc1.42E01E, mp4a.40.2')" type="button">Test</button></span></p><p>Can my browser play OGG videos? <span><button onclick="supportType(event,'video/ogg','theora, vorbis')" type="button">Test</button></span></p><script> function supportType(e,vidType,codType) { var x = document.createElement("VIDEO"); isSupp = x.canPlayType(vidType+';codecs="'+codType+'"'); if (isSupp == "") { isSupp = "No"; } e.target.parentNode.innerHTML = "Answer: " + isSupp;} </script> </body> </html>