<!DOCTYPE html>charset="utf-8"W3Cschool教程(w3cschool.cn)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.");