code: function _inherit(Ctor, Parent) {
  	function Dummy () {}
  	Dummy.prototype = Parent.prototype
  	Ctor.prototype = new Dummy()
  	Ctor.prototype.supper = function () {
  		Parent.apply(this, arguments)
  	}
  	Ctor.prototype.constructor = Ctor
  	return Ctor
  }
docs: Prototype inherit