How to make 2 dependent select windows instead of one?

Question

HTML

Good day, wave, how to make 2 windows, one of which depends on the other?
for example, not
-audi
--100
--200
...
but the choice of audi and in the second window 100 or 200...

Answer 1

https://github.com/tuupola/jquery_chained#simple-usage and master the html/gui vocabulary - select and "window" are different things, what you call a window is a dropdown list