Question: I have web pages that may or may not need to do some pre-processing before it can be displayed to the user. What I have done is to display this page with a message (e.g. "please wait ..."), then do an http-equiv refresh **to the same page**. When it refreshes to the same page, the pre-processing is done and the actual content is displayed.

Will this harm me in terms of SEO?

Answer: 
I suppose the best way to think of it is that "static" means unchanging, and it is the *location* of the variable that is unchanging when when you switch between the different instances of a class. The main thing is to eradicate any thought from your mind that the *value* of a static variable is unchanging: it may even be changed by another instance of the same class.
> 
> Definition of STATIC 1 : exerting
>  force by reason of weight alone
>  without motion 2 : of or relating to
>  bodies at rest or forces in
>  equilibrium 3 : showing little change
>  4 a :
>  characterized by a lack of movement,
>  animation, or progression b :
>  producing an effect of repose or
>  quiescence 5 a :
>  standing or fixed in one place :
>  stationary b of water : stored in a
>  tank but not under pressure
> 
> 
> 

just apply the definition to a variable...