private void SetDay(int iYear, int iMonth)
    {
        int iDay = 0;
        for (int iDayCount = 0; iDayCount < DateTime.DaysInMonth(iYear, iMonth); iDayCount++)
        {
            iDay = iDay + 1;
            this.DropDownList1.Items.Add(iDay.ToString());
        }
    }

    protected void DropDownList3_SelectedIndexChanged(object sender, EventArgs e)
    {
        this.Response.Write("Test");
    }

    protected void DropDownList3_Init(object sender, EventArgs e)
    {
        int iStartYear = 1900;
        for (int i = 0; i <= DateTime.Now.Year; i++)
        {
            int iCurrentYear = iStartYear + i;
            if (iCurrentYear != DateTime.Now.Year && iCurrentYear < DateTime.Now.Year)
            {
                this.DropDownList3.Items.Add(iCurrentYear.ToString());
                
            }
        }
    }
    protected void DropDownList2_Init(object sender, EventArgs e)
    {
        List<string> objList = new List<string>();
        objList.Add("January");
        objList.Add("February");
        objList.Add("March");
        objList.Add("April");
        objList.Add("May");
        objList.Add("June");
        objList.Add("July");
        objList.Add("August");
        objList.Add("January");
        objList.Add("October");
        objList.Add("November");
        objList.Add("December");

        for (int i = 0; i < objList.Count; i++)
        {
            int iMonth = i + 1;
            ListItem objItem = new ListItem(objList[i].ToString(), iMonth.ToString());
            this.DropDownList2.Items.Add(objItem);
        }
    }
    protected void DropDownList1_Init(object sender, EventArgs e)
    {
        int iDay = 0;
        for (int iDayCount = 0; iDayCount < DateTime.DaysInMonth(1900, 1); iDayCount++)
        {
            iDay = iDay + 1;
            this.DropDownList1.Items.Add(iDay.ToString());
        }
    }