Absolutely positioned image. This image was placed here using css2 absolute positioning

See? That image to the right is exactly where I told it to be, in relation to this page. Oh, and I put in the border so you can see where the image edges go.

I can even obscure this text by placing an image on top of it like this. Hello? Hello?? Oh, good, I'm back. Do you see?

It's just a matter of trying out different values and getting the element exactly where you wanted it.