Thanks for the reply.
But that's not totally what I'm looking for. The point is, that I want plain text in my database, for example:
This is a bold('sentence')
Of course the easy solutions are:
html - This is a <b>sentence</b>
php - This is a <?php echo "<b>sentence</b>"; ?>
java script - this is a <script>document.write("<b>sentence</b>");</script>
plain text if I got a good java script function i'm looking for - This is a bold('sentence')
I hope you guys understand what I want now.