JS對數字進行貨幣格式化並且保留兩位小數點，小數用0補全

/**
* 將數值四舍五入(保留2位小數)后格式化成金額形式
*
* @param num 數值(Number或者String)
* @return 金額格式的字符串,如'1,234,567.45'
* @type String
*/
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);
}

/**
* 將數值四舍五入(保留1位小數)后格式化成金額形式
*
* @param num 數值(Number或者String)
* @return 金額格式的字符串,如'1,234,567.4'
* @type String
*/
function formatCurrencyTenThou(num) {
num = num.toString().replace(/\$|\,/g,'');
if(isNaN(num))
num = "0";
sign = (num == (num = Math.abs(num)));
num = Math.floor(num*10+0.50000000001);
cents = num%10;
num = Math.floor(num/10).toString();
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);
}

 

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