 <p>Have you considered a <a href="http://www.smashingmagazine.com/2008/05/06/25-wysiwyg-editors-reviewed/" rel="nofollow">WYSIWYG editor</a>? For example the editor in which you typed your question in this site is <a href="http://code.google.com/p/wmd/" rel="nofollow">WMD</a> and it allows to bold the text.</p>