wiki toolbar button? does it exist??

Hello,

I'm using fckeditor to accept pre-formatted text (or text they format within fckeditor) from users. I'm storing this in a database for future use. I'm then trying to take this data and import the formatted text into mediawiki (for an internal site). I've searched on the site and seen there are some toolbars that have a "wikitext" button. Does this button convert inputted html into wiki format in the same way the source button shows the html output? If so, how can I activate this button?? I've tried 'wiki' and 'wikitext' but without any luck.

Thanks,

m