Cut is half of a cropping interface in browser JavaScript. It provides support for dragging and scaling an image relative to a fixed cropping box.

demo/ contains an example of a cropping tool with close-to-global support via Cut, <input type="image">, and another set of <input> elements, which receive (and display) specific coordinates. Feel free to use it as a base.

Cut supports Internet Explorer 9 and higher, and the most recent stable version of anything else.