It is a common scenario for ASP.NET applications to show/hide controls as a result
of user interaction or some event. You can have the same functionality with AJAXManager
as well but should have the following in mind - RadAjaxManager relies on the HTML output of
controls to be updated, that's why you need to put the control that should be updated in
an always visible container like ASP Panel. Then set in the AJAX Manager the AJAX pairs where
the AJAX initiator control should update the ASP Panel. In the code-behind set the Visible property of the control that should be shown/hidden to true
or false accordingly. Additional information on the matter can be found in our documentation link below:

Toggle control visibility