Centering a percent-based div

Question

Recently, a client asked that his site be percent-based rather than pixel-based. The percent was to be set to 80%. As you guys know, it is very easy to center the container

Answer 1

I know it sounds crazy but how about getting the width in jQuery then resetting it so it is a pixel value?

Or basing the width off the page width in jQuery?

It's pretty weird he wants a percent based layout.

Oh and last but not least, two 10% width divs surrounding it ;)