1. <script>   
2.     var obj={"age":12,"name":"huangbiao"};   
3.     alert(obj.age);   
4.     alert(obj.name);   
5.     //添加属性   
6.     obj["sex"] = "boy";    或  obj.sex="男";
7.     //遍历JSON对象   
8.     for(var index in obj){   
9.         alert(index);   
10.         alert(obj[index]);   
11.     }   
12.     //删除JSON属性   
13.     delete obj.age;   
14.     alert(obj.age);   
15. </script>  

　　//json 数组对象

var productArr = [
{"pName":"笔记本","price":"4800","address":"广东富山"},
{"pName":"鼠标","price":"50","address":"北京"},
{"pName":"空调","price":"1300","address":"格力"}
];

//添加对象

productArr.push({"pName":"sssssss","price":"1300","address":"格力"});

json添加、删除、遍历属性