Fixed center alignment of a div

[Phox]

Hey there, I'm an amateur web designer with a rather important problem at hand: I have a centered div with content outside the main container, and when I resize my browser the centered div tries to recenter, infringing on my other content. I have no problem keeping it in the center, but I'd like it to scroll horizontally when resized instead of recentering. The CSS I have on the main container is currently

#content-body {border: 1px solid #999; background: #CCF; margin-left: auto; margin-right: auto; width: 777px; height: 901px; text-align: left;}

[Phox]

Hey there, I'm an amateur web designer with a rather important problem at hand: I have a centered div with content outside the main container, and when I resize my browser the centered div tries to recenter, infringing on my other content. I have no problem keeping it in the center, but I'd like it to scroll horizontally when resized instead of recentering. The CSS I have on the main container is currently

#content-body {border: 1px solid #999; background: #CCF; margin-left: auto; margin-right: auto; width: 777px; height: 901px; text-align: left;}

site is www.freewebs.com/phoxhound

[drhowarddrfine]

Instead of auto on the left-margin, change it to the width of whatever is on the left of that (forgot to look).