How do I show login form to anonymous user when accessing particular form I have created an entry form. Only authenticated user can access it. I have created a menu link for it and if any anonymous user clicks on menu link I want to show a login form and after successful login user is redirected to that entry form. I don't want to hide the menu link from anonymous user.(I have about 5 to 6 forms with same condition)
Logintoboggan will allow you display a login form when a user hits an access denied page:


  Provide a login form on Access Denied pages for non-logged-in (anonymous) users.