I have put this in my partial view:
@HttpContext.Current.Request.RequestContext.RouteData.Values["controller"].ToString()
in the same kind of situation you describe, and it shows the controller described in the URL (Category for you, Product for me), instead of the actual location of the partial view.
So use this alert instead:
alert('@HttpContext.Current.Request.RequestContext.RouteData.Values["controller"].ToString()');