每三位添小数点

每三位加小数点

<script type="text/javascript"> String.prototype.format = function(){        return this.replace(/\d(?=(?:\d{3})+\b)/g,function(v) {            return v + ',';        });    }    var a = 76884526;    alert(a.toString().format()); //return 67,884,526.88</script>