本例使用函数来构造对象

<script>

  function person(firstname, lastname, age, eyecolor) {

    this.firstname = firstname;

    this.lastname = lastname;

    this.age = age;

    this.eyecolor = eyecolor;

  }

  myFather = new person("John", "Doe", 50, "blue");

  document.write(myFather.firstname + " is " + myFather.age + " years old.");

</script>