I am having a lot of trouble with getting part of my site to stay within the #mainwrapper part of my css. The part is the middle which contains the navcolumnleft, center (not sure exactly what it's called), and navcolumn right. These three protrude futher than the main wrapper so it hides the border of my #mainwrapper on the right side. If anyone could help me with this, I would really appreciate it. If you want to look at my site for better understanding, it is www.eighty8threads.com/zencart

thank you in advance