Is there any possible way for me to keep the background image of my forum from scolling with the forum itself?

Here's my forum: http://www.steelersxtreme.com/forum

Here's the homepage (html): http://www.steelersxtreme.com/

Note that the homepage bg image doesn't scroll, but the content does. I did this with a "bg properties" html code. Is this possible to achieve with the forum background?

Thanks.

We've solved this.