Geert Uytterhoeven dixit: >I added [ 10000 lines of explanation ] Wow, you rock! Thanks, //mirabilos -- I believe no one can invent an algorithm. One just happens to hit upon it when God enlightens him. Or only God invents algorithms, we merely copy them. If you don't believe in God, just consider God as Nature if you won't deny existence. -- Coywolf Qi Hunt