js函數的作用域與this指向
http://www.cnblogs.com/longze/p/3542582.html
Js作用域與作用域鏈詳解
http://blog.csdn.net/yueguanghaidao/article/details/9568071
js函數的作用域與this指向
http://www.cnblogs.com/longze/p/3542582.html
Js作用域與作用域鏈詳解
http://blog.csdn.net/yueguanghaidao/article/details/9568071