Browser side code editor component

do you know any browser-side component, in HTML/Javascript, Flash, Applet or Silverlight, that would allow source code edition with syntax highlighting and auto-completion.

CodeMirror has a good syntax 开发者_如何转开发highlighting support but does not seem to support auto-completion.

If no such editor exists do you know any way to implement auto-completion using HTML and javascript or any other browser-side technology ?

Thanks by advance.

You might look into Bespin. It is an open source html 5 based IDE. I don't know how hard it would be to extract just the editor component, but it sounds promising.