function showCalc(){
	document.form_iraCalc.retSav.value = iraCalc()
}
	

function iraCalc(){
	curAgeVal = document.form_iraCalc.curAge.value;
	retAgeVal = document.form_iraCalc.retAge.value;
	yrs = retAgeVal-curAgeVal;
	annContVal = parseFloat(document.form_iraCalc.annCont.value);
	intrVal = document.form_iraCalc.intr.value*.010;
	startBal = 0;
	newBal = 0;
	annualInt = 0;
	
	for (var i = 0; i < yrs; i++ ){
		annualInt = (startBal + annContVal) * intrVal;
		newBal = annualInt + startBal + annContVal;
		startBal = newBal;
	}
	num = startBal + annContVal; 
	return formatCurrency(num);
}

function formatCurrency(num) {
	num = num.toString().replace(/\$|\,/g,'');
	if(isNaN(num)) num = "0";
	cents = Math.floor((num*100+0.5)%100);
	num = Math.floor((num*100+0.5)/100).toString();
	if(cents < 10) cents = "0" + cents;
	for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)
	num = num.substring(0,num.length-(4*i+3))+','+num.substring(num.length-(4*i+3));
	return ('$' + num + '.' + cents);
}