xmlhttprequest instead of using php in this tutorial

xmlhttprequest instead of using php in this tutorial

http://net.tutsplus.com/tutorials/javascript-ajax/how-to-build-an-rss-reader-with-jquery-mobile-2/comment-page-2/#comment-358234

Does anyone know how one would use this tutorial and instead of using the php (not compatible with phonegap) use xmlhttprequest...

Im having real issues getting it implemented.