Ajax without submti button?

Vapor .. wrote:

I have a drop down list, how can I set it up to
send request when selecting an option rather
than pressing submit button after selection?

And how can I save values of checkboxex/radio
buttons without submit?

I think observe_field may be what you're looking for. Radio buttons may be
problematic, but it works very well with check boxes, drop downs, and other
form controls.