Mathematic WYSIWYG html editor

I'm looking for a mathematical WYSIWYG HTML editor. So it has to be capable of producing well formed mathematical expressions like in this example:

http://www.blau-test.be/files/example.jpg ( the font really doesn't mather, considering it can be styled using css )

Pricing doesn't matter, but it can be free 2 offcourse. If it is , the creator can expect a large donation ;)

It should be capable of producing the most common math e开发者_如何转开发xpressions available , if not all! It don't expect it to work properly on IE6 but IE7 and IE8 would be nice!

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Mathematicians swear by TeX as being the most effective way to describe complex formulae to the degree that the'll often use TeX notation when communicating via plain text.

There are a number of different editors for different circumstances, but I've personally never seen a more concise, accurate, and on-the-fly modifiable means of getting idea to typography.

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For very good WYSIWYG just fork MathQuill from github.

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If pricing really doesn't matter have a look at Mathematica. It can export mathematical expressions in MathML which most browsers can present, either natively or with a plug-in.

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Take a look at mathoverflow.net. They handle math markup very well. They use MathJax.

MathOverflow LaTeX support is MathJax, a method of including mathematics in web pages using javascript.

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I felt someone should mention Design Science's product, MathFlow. I have no experience with the product, but the company has long been a supporter of MathML and related standards, and the products certainly merit some attention for a serious project.

On MathJax: The OP asked for WYSIWYG, and I'd argue that being able to quickly write out a math expression in ascii, latex or mathml and have it directly interpreted by a one-line script included on a page, provides as much or more immediate accessibility and feedback than a GUI interface.