Tiny OO inheritance of JavaScript

Class.js

function Class (proto, Super) {
	// use noop function as default constructor if user not defined as in Java
	var i, newClass = proto.hasOwnProperty('constructor') ? proto.constructor : function () {};
	
	if (Super) {
		var SuperHelper = function () {};
		
		SuperHelper.prototype = Super.prototype;
		
		// make `instanceof` could be use to check the inheritance relationship
		newClass.prototype = new SuperHelper();
		
		// fix constructor function
		newClass.prototype.constructor = newClass;
		
		// copy static members from super class to new class (not override)
		for (i in Super) {
			if (!newClass.hasOwnProperty(i) && Super.hasOwnProperty(i)) {
				newClass[i] = Super[i];
			}
		}
		
		SuperHelper = null;
	}
	
	// copy user defined prototype members back to new class
	for (i in proto) {
		if (proto.hasOwnProperty(i)) {
			newClass.prototype[i] = proto[i];
		}
	}

	return newClass;
}

/*
var A = Class({
	constructor: function(name){
		this.name = name;
	}
});

var B = Class({
	constructor: function (name, age) {
		A.call(this, name);
		this.age = age;
	}
}, A);
*/