这段代码，在修改haj.name='haj1'后，为什么sayName()输出为haj，haj.name为haj1？

Question

function person(name,age,sex){
var o=new Object();
o.name=name;
o.age=age;
o.sex=sex;
o.sayName=function(){
console.log(name);
}
return o;
}
var haj=person("haj",29,"M");
haj.sayName();//haj
haj.name="haj1";
haj.sayName();//haj
console.log(haj.name);//haj1

Answer 1

o.sayName=function(){
console.log(this.name);
}