function get_popup(mypage) {
winprops = 'height=700,width=600,scrollbars=yes,resizable=yes,toolbar=no,statusbar=no'
win = window.open(mypage, 'buy_now', winprops)
if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
}

function Morgcal(){
	form = document.myform
	LoanAmount= form.LoanAmount.value
	DownPayment= "0"
	AnnualInterestRate = form.InterestRate.value/100
	Years= form.NumberOfYears.value
	MonthRate=AnnualInterestRate/12
	NumPayments=Years*12
	Prin=LoanAmount-DownPayment
	MonthPayment=Math.floor((Prin*MonthRate)/(1-Math.pow((1+MonthRate),(-1*NumPayments)))*100)/100
	form.NumberOfPayments.value=NumPayments
	form.MonthlyPayment.value=MonthPayment
	}