I have started a project in phonegap for windows phone, and created a login form. Backend I have written some c# code for perform some api methods and check login.
And I have build the phonegap and got output file for all the platform. Whether is it compatible with all other platform than windows ?
For working with cross platform, I have created a web service and called the method of web service with ajax call,
If the webservice hosted in any other domain you should use
Refer more :- http://jquerymobile.com/test/docs/pages/phonegap.html