Partial page updates using ASP.NET Ajax

In my previous tutorial or article i have explained how to start ASP.NET AJAX. In this ajax tutorial or ajax article i will show you how we can update partial page using asp.net ajax or how we can use multiple update panel in aspx page. Before going to an example i want to let you know some basics on partial page loading using ajax.1. If you use muliple update panel in a page & initiate triger