关于this的问题.

Question

function person(firstname,lastname,age,eyecolor){     this.firstname=firstname;     this.lastname=lastname;     this.age=age;     this.eyecolor=eyecolor;     this.changeName=changeName; function changeName(name){ this.lastname=name; } } myMother=new person("Sally","Rally",48,"green"); myMother.changeName("Doe"); document.write(myMother.lastname);下面代码中，如果说this指向调用它的函数，那么下面的this不是指向changeName.那么changeName.lastname不是undifined么。 function changeName(name){ this.lastname=name; }

Answer 1

changeName是被调用的函数，调用它的函数是myMother