javascript为数字添加逗号千分符
function CommaFormatted(amount) { var delimiter = ","; // replace comma if desired var a = amount.split('.',2) var d = a[1]; var i = parseInt(a[0]); if(isNaN(i)) { return ''; } var minus = ''; if(i < 0) { minus = '-'; } i = Math.abs(i); var n = new String(i); var a = []; while(n.length > 3) { var nn = n.substr(n.length-3); a.unshift(nn); n = n.substr(0,n.length-3); } if(n.length > 0) { a.unshift(n); } n = a.join(delimiter); if(d.length < 1) { amount = n; } else { amount = n + '.' + d; } amount = minus + amount; return amount; }