js 创建对象、修改对象、删除对象及引用对象案例

<script type="text/javascript">var p = {name:"老头",age:20};p.name = "老王";   //修改键值；p.age = 45;alert(typeof p.name);   //获取name键值属性；delete p.age;   //删除键//alert(p.name);//alert(p["name"]);for(var key in p){alert(key + "--" +p[key]);    //遍历P这个对象，key是对象的键，p[key]是获取key键的值}</script>