[development] Multiple drop-down boxes for 1 category

[Ámon Tamás]

Hello,

I have a vocabulary with multiple (or single) hierarchy. For example this:
animals
-cows
-dogs
-rats
colors
-red
-purple
-white

etc.

If I add a node with this vocabulary, I like two drop-down boxes:
First with animals, colors, and when it is change, I like to change the
second drop-down box with the firsts sub-categories with ajax. With
which hook can I change it? Or there is a similar module?

(This is similar this:
http://pear.php.net/manual/en/package.html.html-quickform.html-quickform-hierselect.php)


-- 
Ámon Tamás
http://amon.hu