Dynamic editor functionality

I’m using the editor plugin and wondered if anyone had looked into dynamically submitting multiple fields during a single edit?

The case in questions…

Applying a discount amount to a record, that automatically populates a total value field based on it and the original price.

My client as also asked for a last modified time adding, which I could do at the same time.

The problem is I can’t make much sense of the jQuery functions at play in the editor plugin.

So whilst the actual sum isn’t a problem, and I can even add extra functionality if for instance a ‘%’ symbol is detected, I don’t know how to save that new value to the record.

Any thoughts or pointers?

http://wordpress.org/plugins/contact-form-7-to-database-extension/