console.log(Object.__proto__===Function.prototype); //true
console.log(Object.prototype.__proto__); //null
console.log(Function.__proto__===Function.prototype); //true
总结结果: 黑线:prototype 红线:__proto__

Object.prototype

Function.prototype

Object

Function

http://www.cnblogs.com/siemon/archive/2009/08/02/1537095.html
http://www.blogjava.net/heavensay/archive/2013/10/20/405440.html