Help! (Special Characters)

[IDEC]

When I had created my guestbook, I worried rather more about how it will support my native Russian, but it is brilliant, thanks! But suddenly problems have occured with some special characters like ", &, <, >, and =. I know very well that it has relationship with HTML and these symbols can be replaced by &quot; , &amp; , etc. when you compose your message, but a lot of visitors of my site and guestbook have all rights to know nothing about it...