function getFlashMovieObject(movie_name) {
  if (window.document[movie_name]) {
      return window.document[movie_name];
  } if (navigator.appName.indexOf("Microsoft Internet")==-1) {
    if (document.embeds && document.embeds[movie_name]) return document.embeds[movie_name]; 
  } else {
  // if (navigator.appName.indexOf("Microsoft Internet")!=-1)
    return document.getElementById(movie_name);
  }
}

var last_musicFileName = "";
function sendFileToFlashMovie(file_name,test_btn_id) {
  var flash_movie = getFlashMovieObject("mp3player");
  if (compareString(file_name)) {
    if (test_btn_id == last_btn_id) {
      flash_movie.SetVariable("/:musicFileName","");
      last_musicFileName = "";
    }
  } else {
    flash_movie.SetVariable("/:musicFileName","audio/"+file_name);
    last_musicFileName = file_name;
  }
  flash_movie.Play();
}

function compareString(file) {
	if (last_musicFileName == file) {
    return true;
  } else {
    return false;
  }
}