Which CGI variable contains the server domain name?

Which CGI variable contains the domain name? For example if the current URL is http://www.acme.com/… , I want the http://www.acme.com part, or at least the www.acme.com part. Path_Info doesn’t have this information, and I couldn’t find any other variable that does.

thanks

Subject: Which CGI variable contains the server domain name?

notes help has a section dealing with the CGI variables, but @GetHTTPHeader(“host”) should get what you wany