I'm a complete beginner at web design, and made a website using basic tutorials. It isn't on the internet.

I'm trying to get the sidebar (which comprises links) to always stay at the top of the page, as opposed to what it's doing right now, which is moving to the middle of page as the page gets larger, and would like to know how to do this with html or css. Thanks in advance, and sorry for my blatant proselytism.