Hi David,
You can refer to the Using javascript/jQuery and CSS help topic where in the "Clear selection for the user combobox if no room is selected" section is explain similar functionality.
I am attaching a sample project that is implementing exactly how to achieve such scenario.
Hope this will be helpful.
All the best,
Plamen Zdravkov
the Telerik team
If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to their
blog feed now.