<asp:ScriptManager ID="ScriptManager1" runat="server">

            </asp:ScriptManager>

        <div id="objCalender" style="width: 100%; height: 100%; overflow: auto;">

        <asp:UpdatePanel ID="UpdatePanel1" runat="server"  UpdateMode="Conditional">

         <ContentTemplate>

        <asp:Calendar ID="Calendar1" runat="server" CellPadding="10" FirstDayOfWeek="Monday"

                    OnDayRender="Calendar1_DayRender" Width="100%" 

            BorderColor="#CCCCCC" BorderStyle="None"

                    BorderWidth="1px"  BackColor="White" Font-Size="Large" 

            NextPrevFormat="ShortMonth" Height="100%">

                    <DayHeaderStyle BackColor="#99CCFF" BorderColor="#CCCCCC" />

                    <DayStyle BorderColor="#CCCCCC" BorderStyle="Solid" BorderWidth="1px" HorizontalAlign="Center"

                        VerticalAlign="Top" Font-Bold="true" />

                    <OtherMonthDayStyle CssClass="npDay" BackColor="#DDDDDD" ForeColor="Gray" />

                    <TitleStyle  BorderColor="#CCCCCC" BackColor="White" Font-Bold="true" />

                    <WeekendDayStyle CssClass="weekend" />

                </asp:Calendar>             

             </ContentTemplate>

            <Triggers>

            <asp:AsyncPostBackTrigger ControlID="showDate" EventName="Click"/>

            </Triggers>

        </asp:UpdatePanel>

        <asp:Button ID="showDate" runat="server" Text="显示" OnClick="showDate_Click" />

protected void Page_Load(object sender, EventArgs e)

        {

            ScriptManager1.Reg