Dropdownlist date selector(no calendar) in AJAX C#.

[macupryk]

I have been looking for code to show a dropdownlist date for a person to select there date of birth without calendar.
I have the below code but if there is some code in Ajax Javascript I will use it.
I feel like I am inventing the wheel.
I have to make sure that all these are c# and return the appropriate value.
I appreciate any help.

public string Populate_MonthList()
        {
            drpCalMonth.Items.Add("January");
            drpCalMonth.Items.Add("February");
            drpCalMonth.Items.Add("March");
            drpCalMonth.Items.Add("April");
            drpCalMonth.Items.Add("May");
            drpCalMonth.Items.Add("June");
            drpCalMonth.Items.Add("July");
            drpCalMonth.Items.Add("August");
            drpCalMonth.Items.Add("September");
            drpCalMonth.Items.Add("October");
            drpCalMonth.Items.Add("November");
            drpCalMonth.Items.Add("December");
            string strMonth;
 
            strMonth = DateTime.Now.ToString("MMMM");
            drpCalMonth.Items.FindByValue(strMonth).Selected = true;
            return (strMonth);
        }
 
        public int DaysInMonth(string strMonth, string strYear) 
        {
            string strDay;
            // Get the current date to get the Year
            DateTime d = new DateTime();
            // Here Year is got from current date. 
 
            var dd = new Date(strYear, strMonth, 0);
           // drpCalDay = 
           // return dd.getDate();
       }
 
       // Avoid Leap Year
       function textDate(value)
       {
           var sel = document.forms[0].date;
           // Clear the select
           sel.options.length = 0;
           // Get the no of days in that month
           var NoOfDays = DaysInMonth(value);
           // Now for that no of dates you loop and build the select
           for(var i=1;i<=NoOfDays;i++)
           {
              // Create new option
              var option = new Option(i, "Value" + i); 
              // Add the new option it to the select
              sel.options[i] = option; 
           }
       }
 
 
 
        public string Populate_YearList()
        {
            int intYear;
 
 
            // Year list can be changed by changing the lower and upper 
            // limits of the For statement
            for (intYear = DateTime.Now.Year - 18; intYear >= DateTime.Now.Year - 99; intYear--)
            {
                drpCalYear.Items.Add(intYear.ToString());
            }
            string strYear;
 
            strYear = DateTime.Now.ToString("yyyy");
            drpCalYear.Items.FindByValue(strYear).Selected = true;
            return (strYear);
 
        }

[gits]

what do you want with AJAX here? AJAX is just a an async XMLHttpRequest that allows you to request some data in the background and update a part of a page instead of reloading the entire page ...

kind regards