1 Number.prototype.formatMoney = function (places, symbol, thousand, decimal) { 2 places = !isNaN(places = Math.abs(places)) ? places : 2; 3 symbol = symbol !== undefined ? symbol : "￥"; 4 thousand = thousand || ","; 5 decimal = decimal || "."; 6 var number = this, 7 negative = number < 0 ? "-" : "", 8 i = parseInt(number = Math.abs(+number || 0).toFixed(places), 10) + "", 9 j = (j = i.length) > 3 ? j % 3 : 0; 10 return symbol + negative + (j ? i.substr(0, j) + thousand : "") + i.substr(j).replace(/(d{3})(?=d)/g, "$1" + thousand) + (places ? decimal + Math.abs(number - i).toFixed(places).slice(2) : ""); 11 };