JW Player failover to Backup streaming server

Hi, I currently have some code that detects the presence of a stream based on a true/false file I can control, and is browser-aware for iOS, Android and flash/desktop. I now need my JW Player code to be replaced with backup servers on user's browsers based on a true/false remote file style, similar to above, if I have problems with the main stream. Can you help? I don't have a huge budget either, sorry!