How change text_area form helper into rich text entry area/control?

Do you know how to render a rich text input area (with HTML formatting
buttons (bold, italics, etc., available?)

In RoR I'm hoping this is very easy to pull off?!?

<%= text_area 'blogentry', 'entry' %></p>
<%= rich_text_area 'blogentry', 'entry' %></p> ???

Haven't found anything helpful yet with multiple Google searches.

Thanks in advance,

as far as i know, riCh_text_area is not html standard
you must use an external tool like FCKeditor or tinyMCE to do that
(i've used tinyMCE for a few projects and it works fine)