Jack is busy slapping some code around, so he asked me to post this for him:
Thanks for the code sample. But the click is tied to an event via jquery, this would do nothing really except reload the page.
So I modified the close button's z-index and changed the names of some of the css selectors to make sure it isn't a cache issue. If the issue stands, please send James a PM with your OS, Browser, Browser version, current cookie and cache settings, etc and we'll debug from there.
I apologize for the 5:30-9:30 when the widget wouldn't close or respond. My bad on that. But please remember that part of why we are switching these out to our own unit is to control the relevance of the ads; a complaint long standing across the boards.