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