protected void Button1_Click(object sender, EventArgs e)
        {
            //Label5.Text = int.Parse(TimeHours.Text);
            try {
                int hour = (int.Parse(TimeHours.Text));
                int min = (int.Parse(TimeMinutes.Text));
                int time = (hour * 60) + min;
                double result = 0;
                double weight = (double.Parse(TextBox1.Text));
                double distance = (double.Parse(TextBox2.Text));
                if (DropDownList1.SelectedIndex == 1) {
                    level = 7;
                }
                if (DropDownList1.SelectedIndex == 2) {
                    level = 11;
                }
                if (DropDownList1.SelectedIndex == 3) {
                    level = 10;
                }
                if (DropDownList1.SelectedIndex == 4) {
                    level = ((distance / time) * 0.12) + 2.6;
                } else {
                    Label5.Text = "Please select a style of swimming.";
                }

                if (RadioButtonList1.SelectedIndex == 0) {
                    result = 1.05 * level * weight * time;
                    Label5.Text = "You burned: " + result.ToString() + " calories.";
                } else
                if (RadioButtonList1.SelectedIndex == 1) {
                    result = 0.0175 * level * weight * time;
                    Label5.Text = "You burned: " + result.ToString() + " calories.";
                } else {
                    Label5.Text = "Please check your entries.";
                }
            } catch (FormatException) {
                Label5.Text = "Please check your entries.";
            }