创建object的方式（对象）

1、new操作符跟Object构造函数

var person = new Object();  可以写成 var person = {};
 person.name = "kitty";
 person.age = 25;

2、“对象字面量”表示法

var person = {
    name: "allan",
    age: 18
};

3、工厂模式

var  createPerson = function(name,age){
    var o = new Object();
    o.name = name;
    o.age = age;
    o.sayName = function(){
        console.log(name)
    };
    return o;
}

var person1 = createPerson("Kitty",18);
person1.sayName();

4、构造函数

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

var person1 = new Person("Kitty",18);
person1.sayName();