ASP.NET AJAX: How Do I: Use the ASP.NET AJAX AlwaysVisible Control Extender?
See how easy it is to anchor a page element to a position on screen, where it remains always visible no matter how far the user may scroll the document. The floating page element may be anything from static text to an AJAX-based, context-aware help box..
Presented by Joe Stagner
Date: 26 January 2007