http://www.cnblogs.com/snandy/archive/2012/05/22/2513652.html
http://www.ruanyifeng.com/blog/2012/11/require_js.html
http://www.cnblogs.com/yexiaochai/p/3214926.html
RequireJS
原文：http://www.cnblogs.com/danghuijian/p/4673356.html
