     this.toggleContent();
    }
    if (aEvent.keyCode == 70) { // f
      aEvent.preventDefault();
      this.goFullscreen();
    }
    if (aEvent.keyCode == 79) { // o
      aEvent.preventDefault();
      this.toggleView();
    }
  }

  /* Touch Events */

  Dz.setupTouchEvents = function() {
    var orgX, newX;
    var tracking = false;

    var db = document.body;
    db.addEventListener("touchstart", start.bind(this), false);
    db.addEventListener("touchmove", move.bind(this), false);

    function 