Facebook Application Profile tabs

[Engineer11]

Hey guys,

I am a facebook developer, a newbie

my problem is that my application supports profile tab,

i have successfully made and integrated profile tab in my application which works perfect when on a userprofile, but when i add the same application on a profile tab things get different

the problem is that how will a know my applicaiton(main app and not the tab) is being acessed by a profile tab or a user profile

i googled it and found out that you hav to ask Facebook for fb_page_id in the query string,

but how to find that ? how do i ask facebook ?

 

By the way I am using codeigniter and the application is iFrame