Hi monstruil,
It’s very difficult to do that. because if you want to create a new field in the JA Submit front end you have to change the code in JA Submit module.
+ first, you have to add a field in ja_submit.html.php file.
+ Add some code to restore the value when the process error. This is not require but it’ll better for user.
+ Then you add the code to get value pass by form in ja_submit.php file to process the value to sent to server.
+ and now you can go to front and to see your result.
+ Note: to get a perfect result. You should add more security action for this field.
Thanks for reading and goodluck
