Cacher is the code snippet organizer for pro developers

http://www.cnblogs.com/chyingp/archive/2013/03/03/how-to-judge-if-stylesheet-loaded-successfully.html

需要做到js 判断css是否存在

http://www.dewen.net.cn/q/2043/JavaScript%E5%A6%82%E4%BD%95%E5%88%A4%E6%96%AD+CSS+%E6%96%87%E4%BB%B6%E5%8A%A0%E8%BD%BD%E6%98%AF%E5%90%A6%E5%AE%8C%E6%AF%95%EF%BC%9F