http://caibaojian.com/jquery-each-json.html
http://www.json.org/json-zh.html
http://www.cnblogs.com/pigtail/archive/2012/06/08/2541314.html
http://www.cnblogs.com/worfdream/articles/1956449.html
原文：http://www.cnblogs.com/gardenintheair/p/4875363.html