Image Field Auto Crop / Auto Size

Hello Guys!

i just want to ask who's an idea how to create javascript codes that the image field we can upload auto cropie or auto size image.

by the way im using with this javascript code : event.target.buttonImportIcon();

Guys please who's have an idea please comment below. i really needed!

Noted: i need this similar to this https://scottcheng.github.io/cropit/ but for adobe acrobat javacodes!

Thanks Alot!