ASP.NET CLIENTSIDE BEHAVIORS

#Scripting Evolves to a More Powerful Technology--
HTML Behaviors in Depth
http://www.microsoft.com/mind/0499/HTMLbehaviors/HTMLbehaviors.asp

#Extend the ASP.NET DataGrid with Client-side Behaviors
http://msdn.microsoft.com/msdnmag/issues/04/01/CuttingEdge/default.aspx