code: function TouchList() {
    var touchList = [];
  
    touchList['item'] = function(index) {
      return this[index] || null;
    };
  
    // specified by Mozilla
    touchList['identifiedTouch'] = function(id) {
      return this[id + 1] || null;
    };
  
    return touchList;
  }
docs: create empty touchlist with the methods
  @constructor
  @returns touchList