The server must be configured to support INCLUDES or this will not work.

An example from the RMWMG page:

<!--#exec cgi="/cgi-bin/rmwmg/textclock.pl" -->

The perl code behind it:

 #!/usr/bin/perl
##############################################################################
# TextClock                     Version 1.0.2                                #
# Copyright 1996 Matt Wright    mattw@worldwidemart.com                      #
$Display_Week_Day = '0';	$Display_Month = '1';
$Display_Month_Day = '1';	$Display_Year = '1';
$Display_Time = '0';		$Display_Time_Zone = '0';
$Standard_Time_Zone = 'EST';	$Daylight_Time_Zone = 'EDT';
$Display_Link = '0';		                                                                       #
##############################################################################

@Week_Days = ('Sunday','Monday','Tuesday','Wednesday',
              'Thursday','Friday','Saturday');
@Months = ('January','February','March','April','May','June','July',
           'August','September','October','November','December');
print "Content-type: text/html\n\n";
if ($Display_Link != 0) {print "<a href=\"http://www.worldwidemart.com/scripts/\">";}

($Second,$Minute,$Hour,$Month_Day,
$Month,$Year,$Week_Day,$IsDST) = (localtime)[0,1,2,3,4,5,6,8];

if ($IsDST == 1) {$Time_Zone = $Daylight_Time_Zone;}
else {$Time_Zone = $Standard_Time_Zone;}

if ($Second < 10) {$Second = "0$Second";}
if ($Minute < 10) {$Minute = "0$Minute";}
if ($Hour < 10) {$Hour = "0$Hour";}
if ($Month_Day < 10) {$Month_Day = "0$Month_Day";}
$Year += 1900;
if ($Display_Week_Day != 0) {print "$Week_Days[$Week_Day]";
    if ($Display_Month != 0) {print ", ";}}

if ($Display_Month != 0) {print "$Months[$Month] ";}

if ($Display_Month_Day != 0) {print "$Month_Day";
	   if ($Display_Year != 0) { print ", ";}}

if ($Display_Year != 0) { print "$Year";
	 if ($Display_Time != 0) {print " - ";}
    elsif ($Display_Time_Zone != 0) {print " ";}}

if ($Display_Time != 0) {print "$Hour\:$Minute\:$Second";
    if ($Display_Time_Zone != 0) {print " ";}}

if ($Display_Time_Zone != 0) { print "$Time_Zone";}

if ($Display_Link != 0) {print "";}
exit;