pop up alert

[Sigrid E Kelsey]

I would like an alert to pop up everytime someone accesses a certain cgi
script (I'm new at this).  I have commented out my lame attempts that don't
work below, but I think they will show what I'm trying to do.

#! /usr/sbin/perl

#print "<SCRIPT LANGUAGE='JavaScript'>
#       alert('MESSAGE');</script>";

if (($ENV{"REMOTE_ADDR"} =~  123.321.321.321) &&
    (!($ENV{"REMOTE_ADDR"} =~ /^123\.123\.123\.132))) {
# alert("MESSAGE");
        print "Location:        blahblah.html\n\n";
} else {
        print "Location:        blahblahblah.html\n\n";
}

thank you in advance for any help!
Sigrid