/**
* Person类：定义一个人，有name属性和getName方法
  */
<script>
  function Person(name){
    this.name = name;
    this.getName = function(){
      return this.name;
    }
  }

  //我们在这里实例化几个对象
  
  var p1 = new Person("trigkit4");
  var p2 = new Person("mike");

  console.log(p1 instanceof Person);//true
  console.log(p2 instanceof Person);//true
</script>

//外部函数
<script>
  function getName() {
    return this.name;
  }

  function Person(name){
    this.name = name;
    this.getName = getName;//
  }
</script>

<script>
  function Person(){};
  Person.prototype.name = "trigkit4";//类的属性都放在prototype上
  Person.prototype.getName = function(){
    return " I'm " + this.name;
  }

  var p1 = new Person();
  var p2 = new Person();
  console.log(p1.name);//trigkit4
  console.log(p2.getName());//I'm trigkit4
</script>

<script>
  function Person(name){
    this.name = name;
  }

  //原型的特性可以让对象实例共享getName方法
  Person.prototype.getName = function(){
    return " I'm " + this.name;
  }
</script>

<script>
  function Person(name){
    this.name = name;
    Person.prototype.getName = function(){
      return name;//不宜用this.name
    }
  }

  var p1 = new Person('trigkit4');
  console.log(p1.getName());//trigkit4
</script>

 var Person = {
    name : "trigkit4",
    age : 21,
    run: function(){
      alert("I like running");
    }
  }

var p1 = Object.create(Person);
  alert(p1.age);//21
  p1.run();//I like running

<script>
  var Person = {

    createNew : function () {
      var person = {};
      person.name = "trigkit4";
      person.run = function(){
        alert("I like running");
      };
      return person;
    }

  }
</script>

 var p1 = Person.createNew();
  p1.run();//I like running