General JS UI design question

General JS UI design question


Hi,
I am new to building JavaScript / AJAX applications. I am building a
web app that has a page made up of a lot of controls such as jquery's
slider.
I do not want this page to have an "apply" button.
Therefore, after sliding a slider for example, I would like to make an
AJAX call that changes my model on the server side, without requiring
that the user explicitely applies this action.
Is building something like this a common pattern ?
My guess is that yes, this is quite common, to the point where this
question is obviously from a clueless newbie.
--
Mel T.