var DateHelper = {
    getYearPart: function (str) {
        return str.substr(0, 4);
    },

    getMonthPart: function (str) {
        return str.substr(5, 2);
    },

    getDayPart: function (str) {
        return str.substr(8, 2);
    },

    dateStringToNOFormat: function (dateStr) {
        if (dateStr == null || dateStr == "") {
            return dateStr;
        }
        return this.getDayPart(dateStr) + "." + this.getMonthPart(dateStr) + "." + this.getYearPart(dateStr);
    }
};