procedure SetUserAgent(aUserAgent: string; aLanguage: string = 'ru-RU');
==== Parameters ====
* **//aUserAgent//**
* //type:// string
* //functions:// new User-Agent
* **//aLanguage//**
* //type:// string
* //functions:// new browser language
===== Examples =====
-SetUserAgent('Mozilla/5.0 (Windows NT 6.1; WOW64; rv:21.0) Gecko/20100101 Firefox/21.0','kz-KZ');