Help with loading into movies

this is probubly so simple to yall but i need some help. I dont want to make my web page huge so i am wanting to have a button that will load content into a box that is in the middle of the screen without having to put it on the main stage. i guess thats dynamics of some sort. Im not sure.

example: click on 3d and it brings you thumbnails of my 3d art.

if you can help please e-mail to [email protected] or post on this thread. thanks for the help. and by the way, MERRY CHRISTMAS!