Seperate codes for different skins

[thejoker]

Hi everybody.
I'm trying to install different skins on my board, problem is, the images from one skin appear on other skins.

I've tried this code (and others like it) as well as scouring ProBoards support for the answers.
<script>
if(pb_skinid=="1"){
//Stuff
}
else if(pb_skinid=="2"){
//Stuff
}
</script>
Nothing works. The images (catbg, titlebg, ect.) from the skin called Xenon show up on other skins.
Here's my board: alexaddams.proboards55.com/index.cgi?
Help would be appreciated.