Paul, I'm at a lost here. I missed your editing of post #4, so never seen the html.
Are you trying to make a choice in a dropdown that will make the next dropdown appear?
Next question. Does the choice you make above present the program with a choice of dropdowns? Like: given the choice odd or even show a different set of numbers depending on the outcome?
I'm guessing here, but I think you need onchange='PUT JS FUNCTION CALL HERE' in the dropdowns. But I still think you need IDs .
Please explain a little further.
Evolution - The non-random survival of random variants.