面向对于javascript编程

function Person(name, age) {
this.name = name;
this.age = age;
this.sayName = function () {
alert(this.name);
}
}

var person1 = new Person("wilson1", 10);
var person2 = new Person("wilson2",20);

Person("wilson3", 30);

person1.sayName();
person2.sayName();

window.sayName();

var person = { _name: "", age: 0, Name: "" };
Object.defineProperty(person, "name", {
get: function () {
return this._name;
},
set: function (newvalue) {
this._name = newvalue;
}
});

person.name = "wilson.fu";

var Person = function (age, name) {
this.age = age;
this.name = name;
}
Person.prototype.name = "";
Person.prototype.age = 0;
Person.prototype.sayName = function () {
alert(this.name);
}
//Person.prototype.name = "wilson";

var person1 = new Person(10, "wilson1");
person1.sayName();

var person2 = new Person(20, "wilson2");

person2.sayName();

var Person = function (age, name) {
this.age = age;
this.name = name;
}
//Person.prototype.name = "Old Value";
//Person.prototype.age = 0;
//Person.prototype.sayName = function () {
//    alert(this.name);
//}

Person.prototype = {
constructor:Person,
sayName: function () {
alert(this.name);
}
};