internal static void InternalSelectDeliveryDate(IWebDriver driver, DateTime date)
        {
            DateTime expDate = ConvertToComparableDate(date);
            DateTime curDate = ConvertToComparableDate(DateTime.Now);

            int clicks = ((expDate.Year - curDate.Year) * 12 + (expDate.Month - curDate.Month)) / 2;
            Func<By, IWebElement> exp = (condition) => { return InternalFindElement(driver, condition, TimeSpan.FromSeconds(1)); };
            By by = By.ClassName("month_next");

            // We currently initialize the wrapDiv, previous, next element every time.
            // To avoid the invalid state exception.
            if (clicks < 0)
            {
                clicks = (-1) * clicks;
                by = By.ClassName("month_prev");
            }

            for (int i = 0; i < clicks; i++)
            {
                IWebElement navButton = exp(by);
                navButton.Click();
            }

            IWebElement targetLinkElem = InternalFindElement(driver, By.Id(expDate.ToString("yyyy-MM-dd")), TimeSpan.FromSeconds(1));
            targetLinkElem.Click();
        }