About client-side programming

If you want to provide additional processing of newly entered data or have more control over user interactions with the data, you can choose to enable events and scripting in the Web DataWindow client control. The use of some client-side events and methods does not require a round trip to the server, so it can improve performance. However, since ASP.NET is designed to take full advantage of server-side programming and state management, the use of server-side DataWindow events and methods is recommended.

The name of the client control is the string obj followed by the name of the DataWindow object in the control. In the Properties window, this read-only property displays as the ClientObjectName property. You use this name when defining functions that handle client-side events and use client-side methods.