Robert’s talk » Get the rendered style of an element: "Get the rendered style of an element
Published on Monday, April 24th, 2006
I guess most of you, one time or another, has had the need to find out what style was actually rendered on an element. The easiest way to do this is through the style property followed by the specific value you’re looking for"
Couple of useful functions in here, although the number of Firefox extensions (Such as Firebug) that let you look at source the fewer custom functions you need for debugging.