javascript 的new 跟 this

javascript 的new 和 this
javascript this
http://www.ruanyifeng.com/blog/2010/04/using_this_keyword_in_javascript.html
补充说明，call和apply都可以改变this

JavaScript  new
http://www.cnblogs.com/leo-penguin/archive/2010/03/20/1689048.html