show/hide dropdown if value selected in other dropdown

[versionvirtual]

Let's say I have two databasejoin elements: "Country" and "State". If user selects in "Country" a certain value (For example "Mexico") I want "State" databasejoin dropdown appear in the form. But if "Country" is anything else, I want to hidde "State".

I mean, "State" dropdown should only appear if "Country" is "Mexico". I guess something like (user_country == "Mexico")

I've read about validation, isempty, isnot, etc... I also tried with "cascadingdropdown" plugin, but can't figure out how to hidde the dropdown if value is not Mexico.

Thanks for your help!

 

[cheesegrits]

Check out the Javascript actions on the element settings. They allow you to do exactly that.

You'd usually want 3 actions ... one running on load to hide it, and two 'change' events to hide and show.

-- hugh