var person = { name: "sin", friends: ["lee", "park"] }; var person1 = Object.create(person); person1.name = "choi"; person1.friends.push("yoon"); document.write(person1.name + "<br>"); // choi var person2 = Object.create(person, { name: { value: "kim" } }); person2.friends.push("hong"); document.write(person2.name + "<br>"); // kim document.write(person.friends); // lee,park,yoon,hong