+my $last_display_change = 0;
+
+my $display_info_counter = 0;
+
+my $display_info_items = [
+ "extract1-license.htm",
+ "extract2-rulesystem.htm",
+ "extract3-spam.htm",
+ "extract4-virus.htm",
+ ];
+
+sub display_info {
+
+ my $min_display_time = 15;
+
+ my $ctime = time();
+
+ return if ($ctime - $last_display_change) < $min_display_time;
+
+ my $page = $display_info_items->[$display_info_counter % scalar(@$display_info_items)];
+
+ $display_info_counter++;
+
+ display_html($page);
+}
+