//千分位
export function toThousands(s,n){
if (!s && s != 0) {
return;
}
n = n > 0 && n <= 20 ? n : 2;
var prefix = "";
if((s+'').indexOf("-")>-1){
prefix = "-";
s = s.replace('-','');
}
if(parseFloat(s+'') == 0){
return "0";
}
s = parseFloat((s + "").replace(/[^\d\.-]/g, "")).toFixed(n) + "";

var l = s.split(".")[0].split("").reverse(), r = s.split(".")[1];
var t = "";
for (var i = 0; i < l.length; i++) {
t += l[i] + ((i + 1) % 3 == 0 && (i + 1) != l.length ? "," : "");
}
return prefix+t.split("").reverse().join("") + "." + r;
}