Have you tried (css rule) { position: absolute; top: 0px; left: 0px; } ?
To give you a definitive answer, I'd need to see your current source. (There are a number of ways to do this, but it depends how you've set up your code).
Can you clarify "actual"? if you're scrolled down a long page, do you want it out of view, or fixed at the top of the viewport?

In the CSS,

body{
margin: 0;
}

I know, it's weird, body should not have a margin as it's the outer width of the page, but that's life :P

You might have to set the body's padding to 0 too. And of course the margin of the image, but I suppose that's default.

Hope that helps.

@ Ben - that'll help - i hadn't thought of CSSing it, but it'll work perfectly i think. that should make it easier.

@ Vincentt - also thanks. I was concerned about the image, and I'll still need to due that, but i think my initial issue actually was the margin issues. but it worked great, so thnx!

For me, this css code is a mainstay. I always start every sheet with this code:

* {
margin: 0;
padding: 0;
border: 0;
}

It disables all the margin and padding issues that I have. It also allows me to put anything on any page without contending with IE or having to create some sort of hack to compensate.

Lot9, I did that too, but then I though: "wait, IE6 didn't support * did it?". It doesn't, right? That's why the holly hack works.