is._dispatchGAEvent('Ended');
      },


      // on file load error

      _onError: function() {
        var player = this;
        player.classList.add('cantplay');
        player.title = 'Sorry, can\'t play track: ' + player.title;
        player.error = true;
        player.setAttribute('aria-invalid', 'true');
      },


      // to convert seconds to 'm:ss' format

      _convertSecToMin: function(seconds){
        if (seconds === 0) return '';

        var minutes = Math.floor(seconds / 60);
       