How would you make a content box expand as more content is added. I know that you would set the left and right sides of the box as a background image and then somehow you could extend that as the box gets bigger.
I tried using height 100% but that just makes the box change size depending on how much content is in the box, I know this sounds contradicting but what I mean is that if I had one line of text the content box would shrink to wrap round the line of text. Instead I want the content box to be a certain size to begin with.

I hope that someone can help.