Json

Notation标记
Json数据格式(JavaScript Obkect Notation)JS对象标记
作用和场景：
<1>数据存储 2.数据交换*
格式：
<1>json对象：{"empno":7,"ename":"史泰龙"}
<2>json数组：[{"nation": "蜀","name": "诸葛亮","able": 10},{ "nation": "吴","name": "周瑜","able": 9}]

数组中可以存放数组

换行

1.\n 控制台和弹窗
2.
网页

解析

function parse(){
        var data={ "nation":[{"deptno":1,"dname":"魏","area":"上"}, {"deptno":2,"dname":"蜀","area":"中"}, {"deptno":3,"dname":"吴","area":"下"}],"hero":[{"id":2,"name":"诸葛亮","deptno":"1"},{"id":2,"name":"黄月英","deptno":1},{"id":3,"name":"郭嘉","deptno":1},{"id":4,"name":"周瑜","deptno":3}]

        };
         for( var i in data){
            alert(data[i].nation);
         }
    }