function fb_init(app_id) { 
	FB.init({
		appId: app_id, 
		status: true,
		cookie: true, 
		xfbml: true
	});
	FB.Event.subscribe('auth.sessionChange', function(response) {
		if (response.session) {
			// A user has logged in, and a new cookie has been saved
			//alert('logged in');
		} else {
			// The user has logged out, and the cookie has been cleared
			//alert('not logged in');
		}
		load_window_content($('#fb'), '/fb/feeds/view');  
	});
}