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