- Js中this的用法:http://www.cnblogs.com/RitaRichard/archive/2011/10/14/2212161.html
- JavaScriptActionScript ubyphp中实现回调函数,以及由此引出的闭包问题的讨论(一):http://tech.ddvip.com/2009-09/1253872419134343.html
- JavaScript作用域 作用域链:http://blog.csdn.net/lmj623565791/article/details/25076713