javascript nodejs Object create proto

1460732511810.js

function Person(){
    this.name = 'anonymous'
}
Person.prototype.toJSON = function toJSON(){
    return 'Person ' + this.name;
};
Person.prototype.pro01 = 'yes';

var p1 = new Person();
p1.name = 'the first person';
p1.obj01 = 'yes';

console.log(p1);
console.log(p1.constructor === Person);
console.log(p1.constructor.prototype === p1.__proto__);
console.log(p1.constructor.prototype === Person.prototype);
console.log(p1.toJSON === Person.prototype.toJSON);

console.log('-----------------');

var p2 = Object.create(Person.prototype);
p2.name = 'the second person';

console.log(p2.obj1 === undefined);
console.log(p2.toJSON === Person.prototype.toJSON);
console.log(p2.constructor === Person);
console.log(p2.constructor.prototype === Person.prototype);


console.log('-------------------');

var p3 = Object.create(p1);
console.log(p3);
console.log(p3.name === p1.name);
console.log(p3.obj01 === p1.obj01);
console.log(p3.constructor === Person);
console.log(p3.constructor.prototype === Person.prototype);
console.log(p3.__proto__ === p1); // ******
console.log(Object.prototype === p3.__proto__);