is it possible to make backgound images change (randomly) for a background?

http://wsabstract.com/script/cut176.shtml

Sorry, I am not good at explaining things!

I meant continuously, so while you are on a page it's background will change every...10 seconds or X seconds.

I don't think that is possible.

That would be very annoying for you visitors. I didn't find that effect, but if you want you can look here (http://www.jsmadeeasy.com/javascripts/Background%20Effects/list_test.asp).