CiviCRM Community Forums (archive)

I have created a new Custom Group with style of Tab and it will allow multiple values to capture.there are two fileds in this group the value of second will change based on First select box value using ajax call and i have written formRule for validation.when i submit if there is any error the second dropdown  value get empty.so i have get the first dropdown value and fill the second one on submit. how to get The selected value of First DropDown?

Hmm... Why don't you make the second select box mandatory as well? This way, if the selecting of the first drop down box fails in setting the second box correctly, an error is provided.

Not sure enough if you want to achieve that, otherwise a _post hook can do the trick of saving the correct value / pass the correct value for the second drop down to the next form.

There are lot's of code examples on how to use the hooks and I can highly recommend reading some, this helps a lot in understanding how to amend CiviCRM without ever touching the core.