ASP.NET AJAX EXTENDER

http://mattberseth.com/blog/2007/07/delay_load_an_updatepanel.html
http://mattberseth.com/blog/2007/06/aspnet_ajax_rendering_a_gmaill.html
http://www.asp.net/ajax/ajaxcontroltoolkit/samples/UpdatePanelAnimation/UpdatePanelAnimation.aspx
http://forums.asp.net/p/1229562/2215435.aspx
http://mattberseth.com/blog/updatepanelanimationextender/
http://msdotnetsupport.blogspot.com/search/label/.NET%20Code%20Samples