Call Webservice in interactive form

Hi,

I have a webservice created from BAPI. I have created interactive form by creating DataConnection and binded the fields in the form.

I'm trying to call webservice on exit of the one of the fields and pass that entered value to webservice and that webservice will return one value and I want that value to be captured and put in to other field.

The following is the script I have written on exit event of the field but it is not calling webservice:

var cURL = "http://fqdn:8000/sap/bc/srt/wsdl/bndg_4ABC986C5E1000BAE1008000AC11420B/wsdl11/allinone/ws_policy/document?sap-client=100" ;

var service = SOAP.connect(cURL);

xfa.connectionSet.DataConnection.execute(0);

Am I missing something?

Appreciate your help.

Regards,

Ravi