Check Demo: http://show-demos.net/suggester/
Download Demo Project:
http://suggester.codeplex.com/releases/view/66494
Browsers Supported: IE6+, FF3.5+, Safari 5.0.4+,
Google Chrome 10.0+, Opera 11.0.1+
Probably older version of Firefox, Safari, Chrome and Opera supported as well. Have no enough time to check them all. So if you see Suggester not works correctly in your browser - let me know and i will try to add support for
your browser as well.
ASP.NET Suggester is the best way for quick entities autocomplete selection. It allows:
- Add text entered by user as unresolved item (item without Value)
- Choose item from list of suggested options that come from WCF or Web service (JSON format)
- Items deleting/navigation with mouse and keyboard (arrow keys, delete button, backspace button)
- Suggester will grow to multiline control if user selects many items
- Adding/Removing items on Server/Client side.
- Suggester remembers its state so it can live between postback’s and can be placed inside UpdatePanel
- New! jQuery UI Themes support.
Check demo.

Legend:
Resolved Item – Item that has Value (ID)
Unresolved Item – Item without ID
Check out Documentation.
Detail information:
Server side features,
Client Side features