var hiddenITBFields = new Array("itbResponse", "itbExternalId");
var holderTAObjects = new Array("ITB_Response", "ITB_ExternalId");

var channel = GetSurveyChannel();
var itbField = "";
var holderObj = "";
var value = "";

for (var i=0; i < holderTAObjects.length; i++) {

	itbField = hiddenITBFields[i];
	holderObj = holderTAObjects[i];

	if(channel == 'Capi') {
		value = RequestForm(itbField);
	} else {
		value = Request(itbField);
	}
		
	f(holderObj).set(value);	

}