how to develop a drag-and-drop feature in JSF

Can someone give me some hints about how to add a drag-and-drop featurn on a HTML page developed in JSF?

For example, on Google personalized page, you can drag-and-drop some components and change their position easily. Can JSF do that, or even better?

Any idea and help is appreaciated!

[305 byte] By [field] at [2007-11-26 10:51:56]