Position:fixed with overflow:hidden parent does not work

I try to apply overflow:hidden on a child-box that has position:fixed. This appears to not work due to the fixed position. Is there a fix?

http://jsfiddle.net/HFZ7V/

I read about a similar problem with positi开发者_如何学Con:absolute elements, but the fixes do not work for fixed elements.

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I've updated your jsfiddle, with a guess of what you're trying to achieve. Let us know if it looks like what you're after.

http://jsfiddle.net/HFZ7V/1/