var tuitionInterval;
var aidInterval;
function CalculateTuition()
{
	var tuition = document.getElementById('txtTuition').value;
	var roomBoard = document.getElementById('txtRoomBoard').value;
	var total = (tuition * 1) + (roomBoard * 1);
	document.getElementById('txtTotalBill').value = total;
	document.getElementById('txtEstimatedBill').value = total;
	CalculateTotal();
}
function CalculateAid()
{
	var grants = document.getElementById('txtGrants').value;
	var loans = document.getElementById('txtLoans').value;
	var scholarships = document.getElementById('txtScholarships').value;
	var otherAid = document.getElementById('txtOtherAid').value;
	var total = (grants * 1) + (loans * 1) + (scholarships * 1) + (otherAid * 1);
	document.getElementById('txtTotalAid').value = total;
	document.getElementById('txtEstimatedAid').value = total;
	CalculateTotal();
}
function CalculateTotal()
{
	var tuition = document.getElementById('txtTotalBill').value;
	var totalAid = document.getElementById('txtTotalAid').value;
	document.getElementById('txtAmountDue').value = (tuition * 1) - (totalAid * 1);
}
function OnCampusClick()
{
	var cb = document.getElementById('cbOncampus');
	if (cb.checked){
		// On-Campus Room and Board value, changes each year
		document.getElementById('txtRoomBoard').value = 10460;
		document.getElementById('txtRoomBoard').readOnly=true;
		}
	else
	{
		document.getElementById('txtRoomBoard').value = 0;
		document.getElementById('txtRoomBoard').readOnly=false;
		}
	RunTuitionCalc();
}
function RunTuitionCalc()
{
	tuitionInterval = setInterval('CalculateTuition()',1);
}
function RunAidCalc()
{
	aidInterval = setInterval('CalculateAid()',1);
}
function StopTuitionCalc()
{
	clearInterval(tuitionInterval);
}
function StopAidCalc()
{
	clearInterval(aidInterval);
}