Quick'n'Dirty FlodJS implementation.

gobmod.js

window.gobmod={};

window.gobmod.attachPlayer = function(elem){
  elem = $(elem);
  var player = new Element('a',{'class':'modplaybutton', href: '#'});
  player.innerHTML='>'
  elem.insert({top: player});

  // Start playback
  var startPlayback=function(){
    stopPlayback();
    player.innerHTML='<img src="/images/loading.gif">';
    
    var xhr = new XMLHttpRequest();
    xhr.open('GET', elem.dataset.url, true);
    xhr.responseType = 'arraybuffer';
    xhr.onload = function(e) {
      if(this.status == 200){
        var uInt8Array = new Uint8Array(this.response);
        window.gobmod.player= window.neoart.F2Player(null);
        window.gobmod.player.load(this.response);
        window.gobmod.playing = elem.dataset.url;
        window.gobmod.playbutton = player;
        player.innerHTML = '#';
        window.gobmod.player.loopSong=1;
        window.gobmod.player.play();
      }else{

        player.innerHTML= 'X';
      }
    };
    xhr.send();
  };

  // Stop playback
  var stopPlayback = function(){
    window.gobmod.playing = null;
    if(window.gobmod.player != null){
    window.gobmod.player.stop();
    }
    if(window.gobmod.playbutton != null){
      window.gobmod.playbutton.innerHTML = '>';
    }
  }


  // On Click
  player.observe('click',function(ev){
    if(window.gobmod.playing == elem.dataset.url){
      stopPlayback();
    }else{
      startPlayback();
    }
    ev.stop();
  });
};

window.gobmod.init = function(ev){
  window.gobmod.player=null;
  window.gobmod.playing=null;
  $$('.modfile').each(function(i){ window.gobmod.attachPlayer(i)});
};

document.observe('dom:loaded',window.gobmod.init);