This page (http://www.telerik.com/help/aspnet-ajax/manager-vs-panel.html) states that you should use RadAjaxManager or RadAjaxPanel and recommends the RadAjaxManger for more complex scenarios. I'm attempting to use the RadAjaxManager on a page that where I want the top RadComboxBox selection to affect which controls below it are visible or hidden. It works but full postbacks are occuring on the page. Why is that? If I wrap the controls with RadAjaxPanels then the full postbacks go way and the AJAX works. I thought you did not need to use RadAjaxPanel with the RadAjaxManger. Am I okay using RadAjaxManger with RadAjaxPanel in this scenario?