Can anyone point me in the right direction to go in to be able to "Ajaxify" a NuSoap call?

Thanks in advance.

BTW, i need to be able to use the serializeenvelope function too.

it's unclear to me what you mean
Ajax is a method to update part of html on the client browser with data provided by the server.
In case of Soap, data exchange happens between servers without any browsers.

Ah, sorry, maybe I wasn't clear enough.

Basically I wondered if it was possible to make asynchronous calls to the SOAP server via nusoap, so that the page does not have to reload.

At the moment, a user selects an item from a drop down box, then clicks a button, then the data is retrieved and they are directed to another page.

I want to be able to do it so that there is no need for a button, they select an option from the drop down box, then (by using the Change javascript function) the data is retrieved instantly, and displays on the page, without the need for a reload.

What you described is pure ajax.
While whole the idea is clear, it's still unclear what you're expecting from nusoap.