js 格式化钱数，三位加一逗号

//格式化钱数，三位加一逗号
function toThousands(number) {
number = number +"";
number = number.replace(/\,/g, "");
if(isNaN(number) || number == "")return "";
number = Math.round(number * 100) / 100;
if (number < 0)
return '-' + outputdollars(Math.floor(Math.abs(number) - 0) + '') + outputcents(Math.abs(number) - 0);
else
return outputdollars(Math.floor(number - 0) + '') + outputcents(number - 0);
}
//格式化金额
function outputdollars(number) {
if (number.length <= 3)
return (number == '' ? '0' : number);
else {
var mod = number.length % 3;
var output = (mod == 0 ? '' : (number.substring(0, mod)));
for (i = 0; i < Math.floor(number.length / 3); i++) {
if ((mod == 0) && (i == 0))
output += number.substring(mod + 3 * i, mod + 3 * i + 3);
else
output += ',' + number.substring(mod + 3 * i, mod + 3 * i + 3);
}
return (output);
}
}
function outputcents(amount) {
amount = Math.round(((amount) - Math.floor(amount)) * 100);
return (amount < 10 ? '.0' + amount : '.' + amount);
}