Programmatically change URL of webservice to submit form

[sunflower]

Is there any way of changing the URL of a webservice to submit a form to?
e.g read the URL from a secondary data source (xml configuration file) and
submit the form to the location specified.

I need something like this so that I can migrate my form through the
development, test and ort environments before implementing it in production
without having to manually change the webservice url.

I am limited to using JScript.

- Sunflower