function formatNumber(num) {
if (!num || num == 'NaN') return '-';
if (num == 'Infinity') return '∞';
num = num.toString().replace(/$|,/g, '');
if (isNaN(num))
    num = "0";
sign = (num == (num = Math.abs(num)));
num = Math.floor(num * 100 + 0.50000000001);
cents = num % 100;
num = Math.floor(num / 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 (((sign) ? '' : '-') + num + ',' + cents);
}