Flash banners vs Animated Gif banner vs Statit Image banner....

[purbeast0]

I'm going to be launching a site soon and need a banner made, and I was just wondering what the general consensous on banners made with flash is or which ones are preferred?

I personally think flash ones look the best, but do they cause any problems being flash and not just some universal standard like a gif?

Which one would you go with?

EDIT: and i'm not talking about an Advertisement banner, I'm talking about a banner that will be at the top of my webpage.

 

[dullard]

Most school computers that I've been on don't have flash. And users don't have the authority to install it. I could see the same happen for other institutions or corporations.

 

[purbeast0]

edited for clarity as well

 

[OrganizedChaos]

static image. if it annoys me i'll adblock it.

 

[eelw]

static image. Any annoying moving banner headers I always AdBlock.