var jsonStr = ‘{"team": "铁三角", "members": [{"name":"小明", "age": 7},{"name":"小红", "age": 8},{"name":"小刚", "age": 9}]}‘;//字符串

var jsonObj = {"team": "铁三角", "members": [{"name":"小明", "age": 7},{"name":"小红", "age": 8},{"name":"小刚", "age": 9}]};//对象

jsonObj = eval("(" + jsonStr + ")");//字符串向对象转换

//遍历铁三角成员

for (var i = 0; i < jsonObj.members.length; i++) {

　　alert(jsonObj.members[i].name);

}

//遍历小明的属性

var ming = jsonObj.members[0];

for (var key in ming) {

　　alert(key);

　　alert(ming[key]);

}

****************************

ajax请求json的jquery实现：

B:

$.ajax({

　　url: "a.aspx",

　　dataType: "json",

　　type: "post",

　　success: function(data) {alert(data[0].demo);},

　　error: function(XMLHttpRequest, status, error) {alert(error);}

});

S:a.aspx

Response.Clear();

Response.Write("[{\"demo\":\"This Is The JSON Data\"}]"); 
Response.Flush(); 
Response.End();

javascript操作json