//格式化数字fmoney("12345.675910", 3)，返回12,345.676
fmoneyFormatPoint : function(s, n) {
n = n > 0 && n <= 20 ? n : 2;
s = parseFloat((s + "").replace(/[^\d\.-]/g, "")).toFixed(n) + "";
var l = s.split(".")[0].split("").reverse(), r = s.split(".")[1];
t = "";
for (i = 0; i < l.length; i++) {
t += l[i] + ((i + 1) % 3 == 0 && (i + 1) != l.length ? "," : "");
}
var amt = t.split("").reverse().join("") + "." + r;
return amt; //返回带有逗号的值
//return amt.replace(new RegExp(/,/g),'');//返回没有带逗号的值
}