I think DragonSlayer was too tired to use any more brains!when im tired even i act like that becoz it feel that my mind is just about to turn off!like it hapened with me last night when Alan posted an answer explaining me and i couldnt understand what was going on so i just looged out and now in the morning i have come and ive understood that question very well!
btw thank Melody and Aziz even i was stuck in the answer which CPhill had posted but now all is clear!Thanks!