No sooner... than

[Unregistered]

I need some help with this structure. Is it possible to use both past simple and past perfect after "no sooner""? I mean are both sentences correct:
No sooner had I closed the front door than I realised that my keys were inside.
No sooner did I close the front door than I realised that my keys were inside.

[Daruma]

1. No sooner had somebody done something than he did something.
2. No sooner did somebody do something than he did something.

Both styles are quite commonly used, but #1 would be better.

Refer to:
http://www.usingenglish.com/forum/as...oner-than.html