var track_1 = document.querySelector("track_1"), 
	track_div_1 = document.getElementById("track_1");
track.addEventListener('cuechange', function () {
  let cues = track.track.activeCues;  // array of current cues
  console.log("cuechange", cues, cues[0].text, cues[0].startTime, cues[0].endTime);
  var d1 = JSON.parse(cues[0].text);
  console.log("d1",d1);
  track_div.innerHTML = d1.title;
  var old = document.querySelector(".now_playing");
  	if (old) {
      old.classList.remove("now_playing");
    }
  var playing = document.getElementById(d.title);
  playing.classList.add("now_playing");
  console.log("playing",playing);
});