Hi, I''m currently sat at home ill and am thinking about a problem I''ve been looking at recently. I have a form that lets users enter orders into a system. At the moment its all pretty simple stuff (proof of concept rather than working just for the time being), with basic details about an order and a place for them to enter billing and delivery addresses. I am also integrating the address entry with an external web-service allowing users to enter their postal codes and have their full addresses entered for them. I''m trying to find a way for this to be handled in an AJAX fashion, so that they can have their addresses completed without needing popups or anything else. The problem I have is this: I need an outer form that handles the regular order submission -- the kind that Rails'' scaffold would generate for you, and then some sub- form type behaviour for the address lookups, enabling users to click buttons after entering a postcode, have a drop-down list appear, and then click another button to have the details then transferred to the outer form''s address fields. I have it kind of working, but, crucially not the form-within-form scenario, it looks like I''ll need to have just one form and then detect what button was clicked -- kind of the way that ASP.NET''s postback model works. I''m just wondering whether others have approached similar things, and if they have any suggestions for the best way to handle this kind of thing. Thanks, Paul www.oobaloo.co.uk