如何根据哪个控件触发AJAX来显示javascript消息？

I'm trying to figure out how to display a "Saved" message on the screen (with a fadeout effect courtesy of JQuery) whenever an AJAX call is made from a control that actually saves the form. The form is relatively complicated and has 5 seperate UpdatePanels where some--but not all--of the controls will do a post-back that will save the form.I'm trying to figure out how to display a "Save