Update '12/player.js'

12/player.js

@@ -10,7 +10,7 @@ track.addEventListener('cuechange', function () {
   	if (old_1) {
       old_1.classList.remove("now_playing");
     }
-  var playing1 = document.getElementById(d.title);
+  var playing1 = document.getElementById(d1.title);
   playing1.classList.add("now_playing");
   console.log("playing1",playing1);
 });