To start off, I haven't done a whole lot of coding, so most of my websites are in HTML. I know a little bit of CSS, so I'm open to having this problem solved either way.

My predicament:

I have a multi-page site that uses the same template throughout. There is an image on either side of the center content (body copy, nav bar, banner, etc.). It is a small sidebar containing a fade into the background image. However, when I did the initial layout, it is only 32x1380 px. The body copy causes my pages to be longer than 1380 pixels. How can I code this image to make it stretch to match the overall height of the page?

Thank you.