however, if you open a new window with this same page by clicking below, those same closes will work in firefox:
open this page in a new window
this is because firefox won't let you close a window that it didn't open - a security issue. for future reference, you can always type "javascript:" into the url window to see script errors...if nothing happens in a javascript error in firefox, always check there for script errors.
open the javascript console (firefox only)