Winamp Toolbar's "Media Match" functionality duplicated in plain JavaScript.

mediaMatch.js

(function(){
  var links = document.getElementsByTagName('a'),
      audio = document.getElementsByTagName('audio'),
      media = [],
      match = /\.(m3u|pls|smil|aac|aif|alac|flac|ogg|mpa|mp3|mp4|m4a|wav|wma)$/i;
  for (var i = 0; i < links.length; i++)
    if (match.test(links[i].pathname))
      media.push(links[i].href)
  for (var i = 0; i < audio.length; i++)
    if (match.test(audio[i].src))
      if (media.indexOf(audio[i].src) === -1)
        media.push(audio[i].src)
  return media
})()