web photoalbum style sheets

Hello,

I've used dreamweaver to create my web albums, now, sometimes my albums contain upwards of 50 pictures or so, now lets say I want to change the background color of ALL my pages to black ie; when the user clicks on a thumbnail the page popping up showing the larger image will have a background color of black. Is there a way to do this all in one step without having to MANUALLY go to each page and changing its page properties? Do i link to a style sheet or something? If so, how do i do this without screwing up the formatting of my pictures. Any help would greatly be appreciated.


Thanks,

Micheal