js的对象
<!DOCTYPE html>
<html>
<body>
<script>
person=new Object();
person.firstname="Bill";
person.lastname="Gates";
person.age=56;
person.eyecolor="blue";
document.write(person.firstname + " is " + person.age + " years old.");
</script>
</body>
</html>
首先定义一个对象person，在person下写各个分支
