I want to create a "next page" and "previous page" navigation.

For example, I would have a page structure that looks like this:

Our Work
> Customer 1
> Customer 2
> Customer 3
> Customer 4
> Customer 5

When the user is viewing OurWork/Customer3/, I would have links like << Previous page and Next page >> which would dynamically link to OurWork/Customer2 and OurWork/Customer3 respectively.

And when the user is on Customer 5, it would only show the previous page (Customer 4).

Any ideas?