changeName() 函数 name 的值赋给 person 的 lastname 属性。 - 在线编辑器

          <script>
  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);
</script>
        