File list (Check if you may need any files):
NestedPopupDemo
...............\App_Data
...............\Bin
...............\...\AjaxControlToolkit.dll
...............\...\ar
...............\...\..\AjaxControlToolkit.resources.dll
...............\...\cs
...............\...\..\AjaxControlToolkit.resources.dll
...............\...\de
...............\...\..\AjaxControlToolkit.resources.dll
...............\...\es
...............\...\..\AjaxControlToolkit.resources.dll
...............\...\fr
...............\...\..\AjaxControlToolkit.resources.dll
...............\...\he
...............\...\..\AjaxControlToolkit.resources.dll
...............\...\hi
...............\...\..\AjaxControlToolkit.resources.dll
...............\...\it
...............\...\..\AjaxControlToolkit.resources.dll
...............\...\ja
...............\...\..\AjaxControlToolkit.resources.dll
...............\...\ko
...............\...\..\AjaxControlToolkit.resources.dll
...............\...\nl
...............\...\..\AjaxControlToolkit.resources.dll
...............\...\pt
...............\...\..\AjaxControlToolkit.resources.dll
...............\...\ru
...............\...\..\AjaxControlToolkit.resources.dll
...............\...\tr-TR
...............\...\.....\AjaxControlToolkit.resources.dll
...............\...\zh-CHS
...............\...\......\AjaxControlToolkit.resources.dll
...............\...\zh-CHT
...............\...\......\AjaxControlToolkit.resources.dll
...............\Default.aspx
...............\Default.aspx.cs
...............\NestedPopupDemo.sln
...............\web.config