# javascript 把數字加上千分位符號

function FormatNumber(n) {
    n = Math.floor(n); //無條件捨去
    n += "";
    var arr = n.split(".");
    var re = /(\d{1,3})(?=(\d{3})+$)/g;
    return arr[0].replace(re, "$1,") + (arr.length == 2 ? "." + arr[1] : "");
}

###### tags: jquery/javascript