var DateUtils = {

        daysBetween: function (start, end) {
            if (!start || !end) { return 0; }
            start = Date.parse(start); end = Date.parse(end);
            if (start.getYear() == 1901 || end.getYear() == 8099) { return 0; }
            var count = 0, date = start.clone();
            while (date.compareTo(end) == -1) { count = count + 1; date.addDays(1); }
            return count;
        },

    businessdays: function(dDate1, dDate2) {
        var d = DateUtils.daysBetween(dDate1,dDate2);
        var t= d%7;

        if (dDate1 < dDate2) {
            w1 = dDate1.getDay();
            w2 = dDate2.getDay();
        }
        else {
            w2 = dDate1.getDay();
            w1 = dDate2.getDay();
        }

        if (w1 > w2) {
            t -= 2;
        }
        if (w1 == 0 && w2 == 6) {
            t--;
        }
        return Math.abs((Math.floor(d / 7) * 5) + t);

    }
    };