var tc_event;

function changeValue(TC_Event) {

var mydata = JSON.parse(TC_Event);

var NM_FIRSTNAME = null;
var NM_PREFNAME = null;
var NM_NAMESETTING = null;

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

if (field.name == 'First Name') {
	NM_FIRSTNAME = field.value;
} else if (field.name == 'PrefName') {
	NM_NAMESETTING = field['value'];
} else if (field.name == 'Preferred Name') {
	NM_PREFNAME = field.value;
}
}

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

if (field['name'] == 'Print Name' && NM_NAMESETTING == 'T') {
field.value = NM_PREFNAME;
} else if (field['name'] == 'Print Name' && NM_NAMESETTING == 'F') {
field.value = NM_FIRSTNAME;
}
}


tc_event = JSON.stringify(mydata);

return tc_event;

}
changeValue(TC_Event);