{JavaScript}將數值增加千分位顯示與解除千分位

增加千分位顯示---

 //千分位效果
    function commafy(num) {
        num = num + "";
        var re = /(-?\d+)(\d{3})/
        while (re.test(num)) {
            num = num.replace(re, "$1,$2")
        }
        return num;
    }

參考資料:
http://hchsjerry.blogspot.com/2008/03/javascript.html

解除千分位--
value.replace(/[,]+/g,"");
參考資料:
http://www.programmer-club.com/ShowSameTitleN/javascript/7743.html