File Structure in Javascript Source

The `script.js` is hella full of functions. If it is possible  ( look [here](https://stackoverflow.com/questions/950087/how-do-i-include-a-javascript-file-in-another-javascript-file) ) one could move eg. all the rendering stuff to one file, all the communications to one file etc. Then in the end have `main.js` and some scripts that are included in that. 