static number_format(number, decimals, dec_point, thousands_sep) { /* * 参数说明： * number：要格式化的数字 * decimals：保留几位小数 * dec_point：小数点符号 * thousands_sep：千分位符号 * */ number = (number + ‘’).replace(/[^0-9±Ee.]/g, ‘’); var n = !isFinite(+number) ? 0 : +number, prec = !isFinite(+decimals) ? 0 : Math.abs(decimals), sep = (typeof thousands_sep === ‘undefined’) ? ‘,’ : thousands_sep, dec = (typeof dec_point === ‘undefined’) ? ‘.’ : dec_point, s = ‘’, toFixedFix = function (n, prec) { var k = Math.pow(10, prec); return ‘’ + Math.floor(n * k) / k; }; s = (prec ? toFixedFix(n, prec) : ‘’ + Math.floor(n)).split(’.’); var re = /(-?\d+)(\d{3})/; //console.log(s) while (re.test(s[0])) { s[0] = s[0].replace(re, “$1” + sep + “$2”); }

}