function updateHTML(elmId, value) {
          document.getElementById(elmId).innerHTML = value;
        }

        function setytplayerState(newState) {
          updateHTML("playerstate", newState);
        }

        function onYouTubePlayerReady(playerId) {
          ytplayer = document.getElementById("myytplayer");
          setInterval(updateytplayerInfo, 250);
          updateytplayerInfo();
          ytplayer.addEventListener("onStateChange", "onytplayerStateChange");
          ytplayer.addEventListener("onError", "onPlayerError");
        }

        function onPlayerError(errorCode) {
          alert("An error occured: " + errorCode);
        }

        function onytplayerStateChange(newState) {
          setytplayerState(newState);
        }

        function updateytplayerInfo() {
          updateHTML("bytesloaded", getBytesLoaded());
          updateHTML("bytestotal", getBytesTotal());
          updateHTML("videoduration", getDuration());
          updateHTML("videotime", getCurrentTime());
          updateHTML("startbytes", getStartBytes());
          updateHTML("volume", getVolume());
        }

        // functions for the api calls
        function loadNewVideo(id, startSeconds) {
          if (ytplayer) {
            ytplayer.loadVideoById(id, parseInt(startSeconds));
          }
        }

        function cueNewVideo(id, startSeconds) {
          if (ytplayer) {
            ytplayer.cueVideoById(id, startSeconds);
          }
        }

        function play() {
          if (ytplayer) {
            ytplayer.playVideo();
          }
        }

        function pause() {
          if (ytplayer) {
            ytplayer.pauseVideo();
          }
        }

        function stop() {
          if (ytplayer) {
            ytplayer.stopVideo();
          }
        }

        function seekTo(seconds) {
          if (ytplayer) {
            ytplayer.seekTo(seconds, true);
          }
        }

        function getCurrentTime() {
          if (ytplayer) {
            return ytplayer.getCurrentTime();
          }
        }

        function getDuration() {
          if (ytplayer) {
            return ytplayer.getDuration();
          }
        }

        

        function mute() {
          if (ytplayer) {
            ytplayer.mute();
          }
        }

        function unMute() {
          if (ytplayer) {
            ytplayer.unMute();
          }
        }