1) Script Title:

2) Script URL (on DD):
http://www.dynamicdrive.com/style/la...d-fluid-fluid/

3) Describe problem:
I am having trouble making a 3 column layout. What I am trying to accomplish is when there is no left or right column, the main column takesup all the space in the container. But if there is a left or right column added, then the main container only takes up the Full Width-Width of column. This will work for any length the left/right containers are. The problem is, this never seems to work. I've tried percentages, min/max length, etc.

Can someone give me any advice on this?