function checkForZero(field) {
		calculatePayment(field.form);
	}


	function Calc_Form(form) {

		if (form.price.value == 0 || form.price.value.length == 0) {
			
			jAlert("The Price field can't be blank or 0.", "Remax Error Alert");
			form.price.focus(); 
			
		} else if (form.amortization.value == 0 || form.amortization.value.length == 0) {
			
			jAlert ("The Amortization field can't be blank or 0", "Remax Error Alert");
			form.amortization.focus(); 
			
		} else if (form.down_pay.value == 0 || form.down_pay.value.length == 0) {
			
			jAlert ("The Down Payment field can't be blank or 0", "Remax Error Alert");
			form.down_pay.focus(); 
			
		} else {
			calculatePayment(form);
		}
	}

	function calculatePayment(form) {
	
		var data = form.amortization.value;
		var split_data = data.split('-');
		var rate = split_data[0];
		var year = split_data[1];

        princ = parseFloat(form.price.value) - parseFloat(form.down_pay.value);

        intRate = (parseFloat(rate)/100) / 12;
		
        months = parseFloat(year) * 12;
		
        form.monthly_payment.value = Math.floor((princ*intRate)/(1-Math.pow(1+intRate,(-1*months)))*100)/100;
		
	}
	
	function getIRate(form){
			
			var data = form.amortization.value;
			var split_data = data.split('-');
			var rate = split_data[0];
			var year = split_data[1];
			document.getElementById('interest_rate').innerHTML = rate+'%';
	}