Calling PHP script from drag and drop REMOVE BUTTON

I want to call a PHP script when the drag and drop REMOVE button is clicked to  update my database.  I understand the PHP is my responsibility, and that's not a problem.  I am not so strong in JS,  but have looked at all files in the drag and drop plugin file structure.  I understand where all the files are at, but what JS or CSS file do I modify, the JS is a bit overwhelming for my skill level.  If you can help me with this, here is how I picture it working.  When the user clicks the REMOVE button, it will call a PHP script that will delete the image path from my database table, then return to a specific page.  NOT the drag and drop page.  Obviously if there is no image to begin with, it will still return to the page that called the drag and drop function.  If this is to much effort, then how can I remove the "REMOVE" button all together, then I will call my PHP script from a button outside the image canvas.  I would be happy either way.  Thanks for any help!

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