Best JavaScript WYSIWYG solution for a fixed box

Question

I have a box which is exactly 425px x 100px and I want my users to style this boxes content with a WYSIWYG editor. They should be able to use nearly every HTML inside of this box.

No, I'm looking for a proper WYSIWYG editor, I used to use TinyMCE for these kind of problems, but I think its best for a long continuous text, but right now I have a fixed box.

It would be great if the editor is able to position text and images absolute, so the user could position their contents wherever they want inside of this box.

Answer 1

http://ckeditor.com/

i found ckeditor useful, have rich functionality regarding image or text, allow you both WYSIWYG and html source formatting methods, and it also have fix sized "canvas" the user could customize according to need,

print screen of my practical use of it,

and here is the source screen and finally i am using 800x500 fixed size canvas