一种无new创建对象的方法

var L=function(){
var obj = {
age:38,
live:true,
job:"web dev"
};

obj.name = "zhouhui";
obj.__proto__ = L.prototype;

return obj;

};

L.prototype={
getName:function(){
console.log(this.name);
},
getAge:function(){
console.log(this.age);
},
getJob:function(){
console.log(this.job);
}
}

var p = L();
console.log(p);
console.log(p.getJob());  //web dev
console.log(p instanceof L); //true