Custom Feedback on Drag-and-Drop Question without Submit button

I've designed some custom feedback panels that fly in when the question is processed. In most cases I like this a lot, but I'm designing a page now that will have three separate drag-and-drop questions. Each question has one drop zone and two things you can drag there, only one of which is correct. I would prefer not to have three separate submit buttons.

Is there a way to trigger an action when something is dropped in the drop zone?

Discussion (1)

Oh. Silly, silly me. All I had to do was enable feedback and choose something other than "Display Message" for what to do. Silly, silly me.

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