[jQuery] How do you make a dive stick to the top of the screen even if you scroll down?

[jQuery] How do you make a dive stick to the top of the screen even if you scroll down?


Hi all,
I pretty much asked my question on the subject line but If it is not
clear, read below:
I want a <div> to stay at the top of the screen when you scroll up and
down. This container div will have two divs inside, the upper one will
contain 'tools' (links, serchbox, etc.), the bottom one will just
contain a stub picture to toggle the 'tools' dive on and off. Thus
normally the page has a small stub fixed at a top corner, when it is
clicked a toolbar slides down.
I wondered if this could be done with jQuery
Many thanks.