Okay ... this is what I want to do:
I've got a form on my page and two dropdown combo boxes. When I select a value in the first combobox, I want the contents of the second combobox to change, according to the value in the first one.
In the first combo i've got:
and when I select Nissan, the second combobox gives me:
And when I select Toyota, the contents will change to:
How do I do that?