How to add custom javascript to content Module?

I want to have a module that displays only a few items with a button at the bottom that would allow the module to Expand/Collapse to show/hide the rest of the products. Are their any plugins/extensions that would allow you to do this? or is there some way i can add custom Javascript/css/html to the specific module? Basically I have a product showing in a position above "said module", "said module" is a display for many accessories to above product. My boss didn't care for the scrolling carousel effect, he wants a button that will expand/collapse the module, displaying only 3 or so accessories when collapsed & "slides down to show the rest of them" (as he described). Help anyone??

I am using joomla 2.5 applying rockettheme template "Kinetic"

Actually I got it all worked out. I used a custom HTML advanced module to define a custom div class, embed the link for the expand/collapse button, and embedded the hikashop module within that. Then I added my own JS library to my js folder and added the js link to the head of my html pages. Felt pretty good working it all out