forEach - MDC
https://developer.mozilla.org/ja/Core_JavaScript_1.5_Reference/Global_Objects/Array/forEach

trim - MDC
https://developer.mozilla.org/ja/Core_JavaScript_1.5_Reference/Global_Objects/String/Trim
Issue 465 - v8 - Support ES5 String.prototype.trim - Project Hosting on Google Code
http://code.google.com/p/v8/issues/detail?id=465

ECMAScript 5 and Chromium/V8 - 0xFF
http://d.hatena.ne.jp/os0x/20100119/1263906657