need help with the expandable divs

I just got this problem when I try to add the expandable divs in my webpage.
However when I click the divs on the page, I can't see the rest of my content.

This is my page, does anybody know what happened with my code??!!:confused:

http://www.calibredesign.com/clients/spec/index.html?view=http://www.calibredesign.com/clients/spec/envi_news_new.html


the divs are on the button of the page.

Thanks!!