To complete merlyns response the WebServer makes available cretain information sent by the browser in the %ENV hash which is probably what you are getting at (I think) This is not sent in the form of TAG /TAG as noted. You can see what is available by installing this script on your web server then pointing your browser at it. The imformation sent depends to an extent on which version of the browser is in use and user settings.
#!/usr/bin/perl
# printenv.pl
print "Content-type: text/html\n\n";
print "$_\t$ENV{$_}\n" for keys %ENV;
__DATA__
You will see something like this:
COMSPEC="C:\WINNT\system32\cmd.exe"
DOCUMENT_ROOT="C:/Program Files/Apache Group/Apache2/htdocs"
GATEWAY_INTERFACE="CGI/1.1"
HTTP_ACCEPT="image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, appl
+ication/vnd.ms-powerpoint, application/vnd.ms-excel, application/mswo
+rd, application/x-shockwave-flash, */*"
HTTP_ACCEPT_ENCODING="gzip, deflate"
HTTP_ACCEPT_LANGUAGE="en-au"
HTTP_CONNECTION="Keep-Alive"
HTTP_HOST="localhost"
HTTP_USER_AGENT="Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; .N
+ET CLR 1.0.3705)"
PATH="D:\Perl\bin\;C:\WINNT\system32;C:\WINNT;C:\WINNT\System32\Wbem"
PATHEXT=".COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH"
QUERY_STRING=""
REMOTE_ADDR="127.0.0.1"
REMOTE_PORT="3264"
REQUEST_METHOD="GET"
REQUEST_URI="/cgi-bin/printenv.pl"
SCRIPT_FILENAME="C:/Program Files/Apache Group/Apache2/cgi-bin/printen
+v.pl"
SCRIPT_NAME="/cgi-bin/printenv.pl"
SERVER_ADDR="127.0.0.1"
SERVER_ADMIN="admin@hbt.tassie.net.au"
SERVER_NAME="localhost"
SERVER_PORT="80"
SERVER_PROTOCOL="HTTP/1.1"
SERVER_SIGNATURE="<address>Apache/2.0.40 Server at localhost Port 80</
+address>\n"
SERVER_SOFTWARE="Apache/2.0.40 (Win32)"
SYSTEMROOT="C:\WINNT"
WINDIR="C:\WINNT"
cheers
tachyon
s&&rsenoyhcatreve&&&s&n.+t&"$'$`$\"$\&"&ee&&y&srve&&d&&print
