inserting data via browser(textarea) into database

I just wanted to make something that creates html-code which should be
inserted in a mysql database.

The user should type text in a textarea. When the user submits the data,
all enters should be translated into "
" and it would be nice if the
user could also insert links ( "
Does someone knows a good, very simple script? There are wysiwyg editors
on the net, but I don't need to modify fonts, colors et cetera. The most
important thing are the "
" tags which should be generated.