URLs to subdirs: www.site.com/special

How do I get a URL to go to a page without an “.html” extension? When I copy “resume.html” to a new file named “resume”, the address www.mysite.com/resume works in IE, but not in Navigator.
Should I be doing it differently, for example, creating a subdirectory called “resume” with a separate index.html file?
Your advice is much appreciated.