Let’s say you have a list of musical styles and when someone chooses one you want to send their selection to a remote page. That remote page will look at their selection and bring back a load of sub-genres for that genre. So if they choose ‘Rock’ they will get back ‘Indie’, ‘metal’, ‘Glam’ etc. With me so far?
That remote page could build a new list of all the sub-genres, and Performer will take that sub-genre list and load it back into the original page inside the element you specify. And all that in the blink of an eye, or at least click of a mouse. Or, indeed, the press of a key – this function (and all the others, as far as my testing has proved) is keyboard-friendly.
Anyway, give it a whirl.