[Techmaker]

function SuperClass() {
	trace("SuperClass constructor called");
	this.__proto__.f1 = function() {
		trace("f1 called");
	};
	this.f2 = function() {
		trace("f2 called");
	};
}
function SubClass() {
	trace("SubClass constructor called"); 
}
SuperClass.prototype.__proto__.f3 = function() {
	trace("f3 called");
};
SubClass.prototype.__constructor__ = SuperClass;
obj = new SuperClass();
trace("---------------");
obj.f1();
obj.f2();
obj.f3();
trace("******************************");
delete SubClass.prototype.__constructor__(); 
obj2=new SubClass();
trace("---------------");
obj2.f1();
obj2.f2();
obj2.f3();