Customizable Web Based Editor?

I'm looking for a web-based wysiwyg style editor, that is straight-forward to customize. I want to limit the options to just a few choices...

undo/redo, uppercase, lowercase, spellcheck, find, clipboard options, and only a few choices of style that I would like to be able to name and possibly write the code for. It will basically grab the text around the cursor (without having to necessarily select) and开发者_如何学Python format it according to parts of a video script.

What is a good editor to do this with (easy points to customize), and is there any examples of possibly similar customizations being done like this already out there?

Try http://ckeditor.com/demo It used to be called fckeditor earlier.