//this function use to display cat product using on chnage 
function check_numeric_value(getValue) {

	getValue = document.getElementById(getValue);
	if(numValue(getValue)== false) return false;

}

function check_present_value() {

	future_value = document.getElementById("future_value");
	if(blankValidation(future_value,"Future value cannot be blank.")== false) return false;

	years = document.getElementById("years");
	if(blankValidation(years,"Year value cannot be blank.")== false) return false;

	discount_rate = document.getElementById("discount_rate");
	if(blankValidation(discount_rate, "Discount Rate value cannot be blank.")== false) return false;

}

function doCalc()
{
	zeroBlanks(document.mainform);
	var p = numval(document.mainform.p.value);
	var r = numval(document.mainform.r.value)/100;
	var y = numval(document.mainform.y.value);

	var w = annuityPayout(p,r,y);
	
	if (document.mainform.payTiming[1].checked)
		w *= (1 + r);
		
	document.mainform.payout.value = formatNumber(w,2);
}