soundFile=sound[randomNum(sound.length)]
  //-- Decide whether to use embed or bgsound.
  if (navigator.appName.indexOf('Microsoft')>=0) {
    document.writeln ('<bgsound src=\"' + soundFile + '\">')
  }else{
    document.writeln ('<embed src=\"' + soundFile + '\" hidden=true autostart=true loop=false>')
  }