Code Editor - Code Mirror

Code Editor - Basic example

CodeMirror is a versatile text editor implemented in JavaScript for the browser. It is specialized for editing code, and comes with a number of language modes and addons that implement more advanced editing functionality.

Code Editor - Theme Example

A rich programming API and a CSS theming system are available for customizing CodeMirror to fit your application, and extending it with new functionality. For mor info go to http://codemirror.net/