Every time I add a show/hide interaction, I find it works great on the first hover or click but then if I click again it no longer works.
Please see the following pages : Social Responsibility (under About) where I started with an expand all button (I plan to remove it if I can get this to work, so they can just hover over each point to read more). Specifically the section 'environmental protection', the first point (smart travelling).
Also see Why work at tootelo? (life at tootelo) where the links show, I can expand them but if I click again they disappear. How do I get it to work continuously?
This will really help me because I will be able to apply your advice to many pages.