var playlength = myplaylist.playlist.length
var currentSong = 0;


$("#jpId").jPlayer( {
  ready: function() { // The $.jPlayer.event.ready event
    $(this).jPlayer("setMedia", { // Set the media
      m4v: "m4v/presentation.m4v"
    }).jPlayer("play"); // Attempt to auto play the media
  },
  ended: function() { // The $.jPlayer.event.ended event
    currentSong++;
    if(currentSong==playlength)
          ------> Show your html
  },
  supplied: "m4v"
);

var currentSong = 0;
$("#music").bind($.jPlayer.event.ended,function(event){
       currentSong++;
       if(myplaylist.playlist.length == currentSong) {
              $('.show').html('Ended');
        }
});