redefining css overflow?

My main div .container is set to overflow:hidden; to maintain 100% height, it nests all content divs except for my header and footer. However inside is my sidebar which contains things that need to overflow out and redefining a child div doesn't seem to work. I开发者_StackOverflow中文版s there a way around this?

I think you'll need to either define your parent DIV with overflow: auto; or set your child div to be absolutely positioned.