javascript添加对象示例：
<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>
结果：
Bill is 56 years old.
替代语法，结果相同:
<script> person={firstname:"Bill",lastname:"gates",age:56,eyecolor:"blue"} document.write(person.firstname + " is " + person.age + " years old."); </script>
