JavaScript 对货币的格式化方法

function FormatCurrency(num)
{
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);
}