如何在stacoverflow上提问？
stackoverflow网站的jquery需要跨域调用Google Javascript API，
网站顶部总会提示
"Stack Overflow requires external JavaScript from another domain, which is blocked or failed to load" ，
修改host，
将http://ajax.googleapis.com通过host绑定本地jquery.min.js文件参考http://www.zhihu.com/question/24766523/answer/38079454 .