Updated your web.config, but Sys is still undefined?

http://encosia.com/updated-your-webconfig-but-sys-is-still-undefined/

Asp.net - The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>)

http://www.aspdotnet-suresh.com/2011/12/aspnet-controls-collection-cannot-be.html

jQuery $(document).ready() and ASP.NET Ajax asynchronous postback

http://blog.dreamlabsolutions.com/post/2009/02/24/jQuery-document-ready-and-ASP-NET-Ajax-asynchronous-postback.aspx