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

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();//hajhaj.name="haj1"; haj.sayName();//hajconsole.log(haj.name);//haj1