var obj = {};
for(var k in obj) {
//遍历对象，k即为key，obj[k]为当前k对应的值
console.log(obj[k]);
}
json是种常用数据传输格式，js怎么解析json格式的数据呢，请参阅下面的代码：
[html] view plain copy print?
var data = '{"return_code":0,"return_message":"success","data":{"data":[{"id":"1","question":"公主令牌在哪交？"},{"id":"2","question":"公主护使有什么用？"},{"id":"3","question":"角斗场在哪？"},{"id":"4","question":"北部断层在哪？"},{"id":"5","question":"欢乐令有什么用？"},{"id":"6","question":"令牌积分有什么用？"},{"id":"7","question":"南部断层在哪？"},{"id":"8","question":"大妖魔令牌交给谁？"},{"id":"9","question":"神工坊在哪？"},{"id":"10","question":"警戒妖珠有什么用？"}]}}';
function ShowData(){
var obj = eval("("+data+")");
alert("return_code:"+obj["return_code"]);
alert("return_message:"+obj["return_message"]);
alert("第一个问题id：" + obj["data"]["data"][0]["id"]);
alert("第一个内容id：" + obj["data"]["data"][0]["question"]);
}
{"return_code":0,"return_message":"success","data":{"data":[{"id":"1","question":"公主令牌在哪交？"},{"id":"2","question":"公主护使有什么用？"},{"id":"3","question":"角斗场在哪？"},{"id":"4","question":"北部断层在哪？"},{"id":"5","question":"欢乐令有什么用？"},{"id":"6","question":"令牌积分有什么用？"},{"id":"7","question":"南部断层在哪？"},{"id":"8","question":"大妖魔令牌交给谁？"},{"id":"9","question":"神工坊在哪？"},{"id":"10","question":"警戒妖珠有什么用？"}]}}