This particular JS file was well over 700 lines and I needed all the help I can get. Thank you Interakt for JSEclipse.
There are plenty of other nice features in the JSEclipse plugin such as:
- Contextual code completion
- Suggest parameters to be filled
- Reads all classes in current project
- Scan current file for words
- Syntax Highlighting
- Syntax based code folding
- Error reporting
You can get JSEclipse here. (Registration Required).