Michael, > isn't 'top' a reserved word? Although Netscape doesn't classify it as a reserved word [1], it is a property of the window object, and as such probably shouldn't be used. aardvark has used it on other pages without incident, apparently, so it doesn't appear to be a problem in point of fact. Caveat coder. James Aylard 1. http://developer.netscape.com/docs/manuals/js/client/jsref/keywords.htm