var tc_event;

function changeValue(TC_Event) {

var mydata = JSON.parse(TC_Event);

var CLASS = null;
var ISOPull = null;
var ISOForce = 0;

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


if (field.name == 'ClassInd'){
	CLASS = field.value;
}
if (field.name == 'PoolNumber1'){
	ISOPull = field.value;
}
}

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

if (field['name'] == 'PoolNumber1' && CLASS == 'STUDENT') {
	ISOPull = 0;
	ISOForce = 1;
}
if (field['name'] == 'PoolNumber1' && CLASS == 'GRAD/PROF STUDENT') {
	ISOPull = 0;
	ISOForce = 1;
} 
if (field['name'] == 'PoolNumber1' && CLASS == 'TEMP EMPLOYEE') {
	ISOPull = 0;
	ISOForce = 1;
} 
if (field['name'] == 'PoolNumber1') {
	field.value = ISOPull;
} 
if (field['name'] == 'PoolNumber1' && ISOForce == 1) {
	field.readOnly = true;
} 
if (field['name'] == 'PoolNumber1' && ISOForce == 0) {
	field.readOnly = false;
} 
}

tc_event = JSON.stringify(mydata);

return tc_event;
}
changeValue(TC_Event);