Preload in the background

I’m trying to find a way to preload my sections before the user clicks them.

While user is reading the first page, the other pages -
page2.swf, page3.swf, page4.swf, etc… preload in the background.

I’m almost sure I’ve seen this happening online, but cannot find any tutorials to show how.

It would be very valuable if it can be done.

Any ideas?