ES3extend

Make ECMAScript 3 runtime environment Compatible with some ECMAScript 5 practical features.

扩展ES3，使 ES3环境可以运行一些ES5中常用的特性，从而兼容老款浏览器（IE7、IE8等）。

Practical features extended:

Array.prototype.every

Array.prototype.filter

Array.prototype.forEach

Array.prototype.indexOf

Array.prototype.lastIndexOf

Array.prototype.map

Array.prototype.reduce

Array.prototype.reduceRight

Array.prototype.some

Array.isArray

Date.now

Function.prototype.bind

Object.create

Object.keys

String.prototype.trim

JSON is not included, json3 is the best!