//Messages:
var Message81 = "The Loan Rate field can't be empty!";
var Message82 = "The Loan Term field can't be empty!";

function cmdCalc_Click() {
	if (calculate.search_rate.value == 0) {
	  alert (Message81);
	  calculate.search_rate.focus();
	}
	else if (calculate.search_term.value == 0) {
	  alert (Message82);
	  calculate.search_term.focus();
	}
	else
	  calculatePayment();
}

function calculatePayment() {
	princ = calculate.calculate_price.value - calculate.calculate_payment.value;
	intRate = (calculate.search_rate.value.replace(",", ".").valueOf()/100) / 12;
	months = calculate.search_term.value * 12;
	calculate.calculate_interest.value = Math.floor((princ*intRate)/(1-Math.pow(1+intRate,(-1*months)))*100)/100;
}

function OpenWindow(link, wdt, hgt) {
	window.open(link,"","width="+wdt+",height="+hgt+",resizable=no,scrollbars=yes")
}