After a lot of high-flying coding trying to get cookies to work (to
remember which user has seen which posts and/or comments) and at the
same be compatible with Internet Explorer, I've decided to BAD (Bypass
All Difficulties) and just show the posts and comments by default,
letting users hide them if they want. Code is so much simpler, and at
the same time IE users get to at least read the posts, even if they
don't get the cool clicking and hiding/showing effects.