工廠模式（工廠模式雖然解決了建立多個相似物件的問題，但卻沒有解決物件識別的問題（即怎樣知道一個物件的型別））

function createPerson(name, age, job) {
    var o = new Object();
    o.name = name;
    o.age = age;
    o.job = job;
    o.sayName = function () {
        alert(this.name);
    };
    return o;
}
var person1 = createPerson("Nicholas", 29, "Software Engineer");
var person2 = createPerson("Greg", 27, "Doctor"); 
 

建構函式模式（在全域性作用域中定義的函式實際上只能被某個物件呼叫；如果物件需要定義很多方法，那麼就要定義很多個全域性函式）

function Person(name, age, job) {
    this.name = name;
    this.age = age;
    this.job = job;
    this.sayName = sayName;
}
function sayName() {
    alert(this.name);
}
var person1 = new Person("Nicholas", 29, "Software Engineer");
var person2 = new Person("Greg", 27, "Doctor"); 
 

原型模式（引用型別存在弊端）

function Person() {}
Person.prototype = {
    name: "Nicholas",
    age: 29,
    job: "Software Engineer",
    sayName: function() {
        alert(this.name);
    }
};
// 重設建構函式，只適用於 ECMAScript 5  相容的瀏覽器
Object.defineProperty(Person.prototype, "constructor", {
    enumerable: false,
    value: Person
});
 

組合使用建構函式模式和原型模式（認可度最高）

function Person(name, age, job) {
    this.name = name;
    this.age = age;
    this.job = job;
    this.friends = ["Shelby", "Court"];
}
Person.prototype = {
    constructor: Person,
    sayName: function() {
        alert(this.name);
    }
}
var person1 = new Person("Nicholas", 29, "Software Engineer");
var person2 = new Person("Greg", 27, "Doctor");
person1.friends.push("Van");
alert(person1.friends); //"Shelby,Count,Van"
alert(person2.friends); //"Shelby,Count"
alert(person1.friends === person2.friends); //false
alert(person1.sayName === person2.sayName); //true

動態原型模式

 
function Person(name, age, job) {
    //屬性
    this.name = name;
    this.age = age;
    this.job = job;
    // 方法
    if (typeof this.sayName != "function") {
        Person.prototype.sayName = function() {
            alert(this.name);
        };
    }
}
var friend = new Person("Nicholas", 29, "Software Engineer");
friend.sayName();

寄生建構函式模式

function Person(name, age, job) {
    var o = new Object();
    o.name = name;
    o.age = age;
    o.job = job;
    o.sayName = function() {
        alert(this.name);
    };
    return o;
}
var friend = new Person("Nicholas", 29, "Software Engineer");
friend.sayName(); //"Nicholas"

穩妥建構函式模式

function Person(name, age, job) {
    //建立要返回的物件
    var o = new Object();
    //可以在這裡定義私有變數和函式
    //新增方法
    o.sayName = function() {
        alert(name);
    };
    //返回物件
    return o;
}
var friend = Person("Nicholas", 29, "Software Engineer");
friend.sayName(); //"Nicholas"