whole_func_string: function on(element) {
  	  var events = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : '';
  	  var callback = arguments.length > 2 ? arguments[2] : undefined;
  	  var passive = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : true;
  	  var capture = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : false;
  	  toggleListener.call(this, element, events, callback, true, passive, capture);
  	}
func_code_string: function on(element) {
  	  var events = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : '';
  	  var callback = arguments.length > 2 ? arguments[2] : undefined;
  	  var passive = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : true;
  	  var capture = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : false;
  	  toggleListener.call(this, element, events, callback, true, passive, capture);
  	}
func_documentation_string: Bind event handler