function Morgcal() { 
	form = document.mortgage_calc;
	PurchaseAmount = form.mortgage_calc_purchase_amount.value;
	DownPayment= form.mortgage_calc_down_payment.value;
	if(DownPayment.include('%')) {
		DownAmt = DownPayment.gsub('%', '');
		LoanAmount = PurchaseAmount * ((100 - DownAmt)/100);
	}
	else {
		DownAmt = DownPayment.replace(/^\$/,'');
		LoanAmount = PurchaseAmount - DownAmt;
	}
	AnnualInterestRate = form.mortgage_calc_interest_rate.value/100; 
  Years= form.mortgage_calc_number_of_years.value; 
  MonthRate=AnnualInterestRate/12; 
  NumPayments=Years*12; 
  MonthPayment=Math.floor((LoanAmount*MonthRate)/(1-Math.pow((1+MonthRate),(-1*NumPayments)))*100)/100; 
	form.mortgage_calc_loan_amount.value = LoanAmount;
  form.mortgage_calc_number_of_payments.value=NumPayments; 
  form.mortgage_calc_monthly_payment.value=MonthPayment; 
}

function mort_calc() { 
	PurchaseAmount = $('mortgage_calc_purchase_amount').value;
	DownPayment= $('mortgage_calc_down_payment').value;
	if(DownPayment.include('%')) {
		DownAmt = DownPayment.gsub('%', '');
		LoanAmount = PurchaseAmount * ((100 - DownAmt)/100);
	}
	else {
		DownAmt = DownPayment.replace(/^\$/,'');
		LoanAmount = PurchaseAmount - DownAmt;
	}
  AnnualInterestRate = $('mortgage_calc_interest_rate').value/100; 
  Years= $('mortgage_calc_number_of_years').value; 
  MonthRate=AnnualInterestRate/12; 
  NumPayments=Years*12; 
  MonthPayment=Math.floor((LoanAmount*MonthRate)/(1-Math.pow((1+MonthRate),(-1*NumPayments)))*100)/100; 
	$('mortgage_calc_loan_amount').value = LoanAmount;
  $('mortgage_calc_number_of_payments').value=NumPayments; 
  $('mortgage_calc_monthly_payment').value=MonthPayment; 
}