Hi everybody... here's the scenario :

On an human task, when the user enter a client code and press a button I need to fill all the customer information from a Web Service.

Could I use javascript or someting similar from an ftl form to call a WS..? ,  I'm trying to avoid doing it on  a service task (java) after the human task it's complete , as the user will not see if the info it's right...

Ideas?

thanks in  advance!