Use CSS to add borders

[rookiedeveloper]

I took off the greyish color from the background, but now I can't add a right & left border. I want to add a background image, and have it repeat to create a border, but when I put it in the body it doesn't work.

[enchantedneedle]

It would help if you would post the code you are trying to alter. And maybe a url to the site.