jQuery AJAX call to ASP.NET method through UpdatePanel?

jQuery AJAX call to ASP.NET method through UpdatePanel?

Hello!

Does anyone know how to call a method from JS through UpdatePanel with jQuery?
I cant call WebMethod cause it is static (I have a custom control and it is statically inaccessible).

What I have:
Custom control on a ASP.NET website in UpdatePanel


What I need:
User clicks on a link and JS does its magic and than I have to post (AJAX) changes to server (custom control).
How do I achieve this with UpdatePanel (I cant jQuery ajax call) - how can I call a method on server with some arguments from JS?