Write field contents to two tables

Write field contents to two tables

Hi there,

I have a form named "Observation" which has in it a multi line field labelled "Issues". We enter items into this field separated by commas. When submitting this form I would like the contents of this "Issues" field to also be written to another table from a different form. I'm guessing I need some sort of on-submit script but don't know where to start.

Is this feasible?

Many thanks!