A common requirement on forms is to have dropdown menus which change their choices depending on the selection in another dropdown. A classic example is "State and Cities". When you select from the State menu, the options on the Cities menu changes to show only cities in the select State.
Fabrik is not affiliated with or endorsed by the Joomla! Project or Open Source Matters. The Joomla! logo is used under a limited license granted by Open Source Matters the trademark holder in the United States and other countries.