Audio OGG Files Check
Learn to serve up ogg audio files for different browser software. Well into 2014 there are popular browser makers that are not supporting the popular mp3 audio file format.
ext = ".mp3";
agent = navigator.userAgent.toLowerCase();
if(agent.indexOf('firefox') != -1 || agent.indexOf('opera') != -1) {
ext = ".ogg";
}
audio = new Audio();
audio.src = "audio/Stoker"+ext;
audio.loop = false;
audio.play();