I'm no sure to understand your question properly. I assume you mean for example that Driver1 and Driver2 can be co drivers. Have you thought about a multi select list for the Drivers - as opposed to a drop down - then you don't have to worry about making another drop down list for the second driver.
That's an easy fix, unless you need to specify which one is the main driver and which one is the co driver?

scor

On Jan 24, 2008 4:16 PM, Graeme McKibbin <gmckibbin@iburst.co.za> wrote:
Hi,
I'm quite new to Drupal and I'm doing quite a big project in it. 
I'll try to keep my questions as short as I can. I wonder if anyone can help. This is my scenario..

I have a hierarchy something like this:

Region 1
-- Vehicle 1
---- Driver 1
---- Driver 2
-- Vehicle 2
---- Driver 3
---- Driver 4
Region 2
-- Vehicle 3
---- Driver 4
---- Driver 6
-- Vehicle 4
---- Driver 7
---- Driver 8
etc

On the submit form, I have an active select that once Region is selected, it filters the vehicle list, which then filters the Driver list
My question is, how do I add, say, a "Co-Driver" (who will be at the same level as the Driver)?

In other words, once someone has selected the Vehicle, I need there to be 2 lists (dropdowns) that are filtered with Drivers and Co-drivers. 
I hope that makes sense!

Any help would be greatly appreciated. Thanks!


Kind Regards,

Graeme McKibbin
Software Developer