function openListen(mp3){
  var win=window.open("mp3listen.php?mp3="+mp3,"win","status=no,scrollbars=no,location=no,menubar=no,resizable=no, toolbar=no, width=300, height=120");
  win.focus();
 }

 function openListenExercises(mp3){
  var win=window.open("mp3listen_exercises.php?mp3="+mp3,"win","status=no,scrollbars=no,location=no,menubar=no,resizable=no, toolbar=no, width=300, height=120");
  win.focus();
 }