Javascript prototypal inheritance samples

set_prototype.js

/*
Sets prototype of a object first way
*/
var a = {afunc:function(){alert("a");}};
var b = {bfunc:function(){alert("b");}};
a.__proto__ = b;
a.bfunc();

/*
Same thing with constructors.
*/

var A = function(){ //This will be our constructors A = A.prototype.constructor
    this.afunc = function(){
        alert("a");
    }
}

var b = { //this will be prototypes of our objects
    bfunc : function(){
        alert("b");
    }
}

A.prototype = b;
var a = new A();
a.bfunc();