Incompatible: My Javascript Banner Any Plugin with Javascript

I’m using the blogbox theme from templatesold… basically the only thing left from the original theme is the rotating banner code. Everything works fine but when I install a plugin using javascript (most contact forms) the slider stops working. Any idea on why this could be happening or what I need to do?

Are there any contact forms I can throw in the sidebar that don’t use javascript you guys can recommend?

I can provide the code or link to my site if necessary.