Frame affecting an image

[HunterOriginal]

ive been looking hard to find a code that would let me do this:
there are three frames, top, left, and main, in the main page there are post boxes, is it possible to make it so that if the top and left frames change, the post box image will change, but not the page? as in.. differant skins could be aplied to one page.. heres my site:
http://www.freewebs.com/clanhunter
currently im workin on a portal to select differant skins from, and i need a way to change the post box image ;) help would be aprieciated

[Sanim]

Hmm. Well, is the post box a background image or just an image?

Here's a script for a styleswitcher: http://www.alistapart.com/articles/alternate

[HunterOriginal]

it is an image in a layer.. http://img.photobucket.com/albums/v50/Aredon/PostBox.gif and i was thinking more along the lines of a Dynamic image, only the trigger would be a frame rather than something your mouse did, style sheets are something im not very good with :/ and besides.. im not sure that would work through a portal

[Sanim]

Yeah, I don't really know DHTML... at all... so I guess I can't help. Good luck on completing that, though!

[HunterOriginal]

wow... that was... no help.. is there anyone who CAN help me?