*ware - JSEclipse - Javascript Editor

JSEclipse is a freeware Javascript plug-in for the Eclipse environment. Designed to help web developers edit JavaScript files with ease, it has built in support for:

     * Code completion for JavaScript function and classes.
     * Code completion for JavaDoc.
     * Function and class names are displayed in the Outline panel for the currently open file.
     * Open declaration
     * Error reporting
     * Warning reporting
     *Code wrap

http://www.interaktonline.com/Products/Eclipse/JSEclipse/Overview/