I'm looking for the simplest way of popping a modal search window on top of an ASP.NET 3.5 application to look up values for a field. I've got a screen for users to add courses; users need to be able to choose an instructor by searching for instructors in a popup.
So - the popup would have a textbox and a gridview with results; clicking the "choose" button in a result would populate the instructor field on the calling form.
What's the simplest way to achieve this?