Jcaptca 图片

http://www.oschina.net/code/snippet_89964_6009

http://blog.csdn.net/tender001/article/details/8469698

http://www.oschina.net/question/100569_11723

http://www.tuicool.com/articles/rMzAFj

http://blog.csdn.net/yaerfeng/article/details/7368541