js中数字格式化问题..

[fashman]

怎么用JAVASCRIPT 把4500,转为:4,500.00格式!谢谢..

[wanghr100]

有人刚问过了...

<script>
function outputMoney(number) {
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);

}

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);
}
</script>
<input type="text" onblur="this.value=outputMoney(this.value)">

[ptma]

function commafy(num){
num = num+"";
var re=/(-?\d+)(\d{3})/
while(re.test(num)){
num=num.replace(re,"$1,$2")
}
return num;
}