This is what you should achieve after following the second part of the tutorial. The source code of this example can be downloaded here:
Get the Code (79.9 KB)
Make a selection and click the "Crop Image" button to see the result. Attention! This example requires PHP/gd support to work.
You can go back to the tutorial by following the next links:
How to Create a jQuery Image Cropping Plug-In from Scratch - Part I
How to Create a jQuery Image Cropping Plug-In from Scratch - Part II