function formatPayment(num) {
var unit = "";
if (num < 10000) {
return formatCurrency(num, 2);
}
else if (num < 100000000) {
num = num / 10000;
unit = "万";
}
else {
num = num / 100000000;
unit = "亿";
}
return formatCurrency(num, 4) + unit;
}
//将数值四舍五入(保留2位小数)后格式化成金额形式
function formatCurrency(num, n) {
num = num.toString().replace(/\$|\,/g, '');
if (isNaN(num))
num = "0";
sign = (num == (num = Math.abs(num)));
var m = Math.pow(10, n);
num = Math.floor(num * m + 0.50000000001);
cents = num % m;
num = Math.floor(num / m).toString();
while (cents.toString().length < n)
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);
}