I have form that uses checkboxes. The value that is sent if a checkbox is selected is 'yes'.

This works fine, but now I am trying to get the value to send 'no' for any checkboxes that are not checked. (something changes on the database side of things so this is what they are asking for). I know I could use a yes/no radio button. But I was really hoping to leave the checkboxes because the way the form is presented, it makes much more sense.

I'm not sure if this is possible on the html side of things, it may involve a php script, but if anybody knows a simple way, please let me know.