var tc_event;

function changeValue(TC_Event) {

var tcInfo = JSON.parse(TC_Info);
var userId = tcInfo.userId;
var ipAddress = tcInfo.ipAddress;
var mydata = JSON.parse(TC_Event);

var LASTNAME = null;
var CRED = null;
var TITLECRED = null;

for (var index in mydata) {
var field = mydata[index];

if (field.name == 'LastName') {
	LASTNAME = field.value;
}
if (field.name == 'Credential') {
	CRED = field.value;
}

if (field['name'] == 'LastName_Cred' && CRED != ' ' && CRED.length >0) {
	field.value = LASTNAME +', '+ CRED.replace(/\W+\-/g, "");
	field.readOnly = true;
} else if (field['name'] == 'LastName_Cred'){
	field.value = LASTNAME;
	field.readOnly = true;
} else if (field['name'] == 'LastName') {
	field.value = LASTNAME.toUpperCase();
	field.readOnly = true;
}
}

tc_event = JSON.stringify(mydata);

return tc_event;
}
changeValue(TC_Event);