>Thanks Guy. I was looking at the ServerVariables but couldn't find a decent list of properties in any of my books.

< TABLE BORDER="1" >
  < TR >< TD >Server Variable< /TD >< TD >Value< /TD >
  < % For Each strKey In Request.ServerVariables % > 
  < TR >< TD >< %= strKey %>< /TD >< TD >< %= Request.ServerVariables(strKey) % >< /TD >
  < % Next % >
< /TABLE >

(extra spaces added to bypass the UT parser)