The Navigator object has an AppVersion property which returns information 
about the version of the browser. The first three characters are 
invariably the version of the browser, followed by a load of supplementary 
information. Except they aren't for IE browsers and Opera browsers later 
than 4.0. So Netscape 2.02 will return 2.02(extra inf), and IE 4.0 will 
return 4.0(extra inf), but IE 5.5 and Opera 5 both return 4.0 and then 
return the extra version information in brackets afterwards. Is there any 
reason why this should be?

Chris