We need to store bank account numbers and will set up a CiviCRM custom field for the data. Ideally we would like the field to be such that people only enter data in the following format xx-xxxx-xxxxxxx-xxx. Is it possible to customise the custom field format? if so how would I do it?
Or do I need to create a work around eg have 4 integer fields that display inline with dashes inbetween.
I'd suggest adding a javascript formatter to a single, custom input text field. I haven't tried it, but formatter.js looks like it would deliver what you want.
Their Credit Card demo illustrates what you want - accepts pasting of data with and without hyphens, prevents pasting / input of values which don't match the validation rule. It just needs a different pattern for hyphen placement to deliver bank accounts.
