Image switch with no preload

Hi all,

I would like to make this page without frames. In order to do this I want to be able to onClick the lower pictures and have the top picture change. I don't want to preload all the images in order to give the appearance of faster load times.

I don't know if the page works at all in Netscape. I haven't had time to figure out if I forgot a closing tag or if the slider script doesn't work. I will work on that later.

http://www.shoutingrock.org/troop214/frame.html