Browser Sniffer script can be used to detect browser and platform types.
This script could be quite useful, especially if you need to target a browser or platform other than Internet Explorer on Windows (PC) with its simple conditional comment method.
To help developers serve a specific style sheet to a specific browser, some form of browser sniffing or detection is needed. For Internet Explorer a conditional comment can be used, but this script facilitates delivery of style sheets for Opera — and others — as well.