#31 SLIPSTREAM tag to specify relationships between fields

[James Dominy]

Add a tag (SLIPSTREAM), valid on all input fields that allows the specification of an onchange event. Example uses include:

1. Updating of a 'full name' field on change of surname and/or first name
2. setting a 'company' field to the customer's current company value when the 'customer' field changes,

(1) is very general (basically copying some javascript into the generated code), but (2) is quite specialised. (1) might be better served by a separate tag (ONCHANGE?), as slipstreaming is a fairly specific concept in this sense.