my($url1, $url2, $url3);
$url1 = "$ENV{'SCRIPT_NAME'}\??item\&$kb\&$kc";
$url2 = "http://blah";
$url3 = "http://blah2";

if($foo1){
   &update_frame($url1);
}
elsif($foo2){
   &update_frame($url2);
}
else{
   &update_frame($url3);
}

sub update_frame{
   my($url) = $_[0];
   print <<HTML;

    <script language = 'JavaScript'>
    <!--
    parent.info.location = "$url";
    //-->
    </script>;
    
    HTML
}