http://www.childbirthsolutions.com/support/glossary/howto.php has a pretty good tool called Active Glossary. Microsoft uses it at http://www.microsoft.com/windows2000/en/server/iis/default.asp?url=/windows2000/en/server/iis/htm/core/iiabdsk.htm too. What it is that you highlight a word, on key up, it does look up. I did a save as on http://www.childbirthsolutions.com/support/glossary/howto.php on my desktop to try to reverse engineer it and find out how I can implement to my own pages. But it gives me a permission denied error. If there is anyone who'd like to hassle with it to sort this out and share the results back with the list, go ahead.