function number_format (number, decimals, decPoint, thousandsSep) { number = (number + '').replace(/[^0-9+\-Ee.]/g, '') var n = !isFinite(+number) ? 0 : +number var prec = !isFinite(+decimals) ? 0 : Math.abs(decimals) var sep = (typeof thousandsSep === 'undefined') ? ',' : thousandsSep var dec = (typeof decPoint === 'undefined') ? '.' : decPoint var s = '' var toFixedFix = function (n, prec) { var k = Math.pow(10, prec) return '' + (Math.round(n * k) / k) .toFixed(prec) } s = (prec ? toFixedFix(n, prec) : '' + Math.round(n)).split('.') if (s[0].length > 3) { s[0] = s[0].replace(/\B(?=(?:\d{3})+(?!\d))/g, sep) } if ((s[1] || '').length < prec) { s[1] = s[1] || '' s[1] += new Array(prec - s[1].length + 1).join('0') } return s.join(dec) }