Most developers make sure that their websites can still communicate the message they want whether JavaScript is enabled or not; others put the interactive parts into other kinds of interactivity such as CSS, AJAX, Flash, and widgets.
They use interactivity to enable the participation of novices in the scientific process just as expert astronomers do on a daily basis.
The term interactivity became a real buzzword in the last couple of years.
Tools for Interactivity - Chris Jennings Introducing the authoring tools Tool metaphors making choices WYSIWYG or HTML?
Tools for Interactivity - Chris Jennings Introducing the authoring tools Tool metaphors Making choices wysiwyg or HTML?