Update JavaScript with Remy's recommendations

1. You've got a global in ie6css, hideText, hideLink and hideParagraph
   
2. I believe (but I've never 100% sure) that you need to change you click handler to include (to ward off any memory leaks):

ie6css = null;
noticeDiv = null;

1. I'd just create the div and do the rest with innerHTML - it's faster and less code.
   
2. ie6Css.setAttribute("href", "") could be written as: ie6Css.removeAttribute("href");