那们高手帮小弟测试下.ajax控件的小事件,执行后时间不会动.

<%@ Page Language="C#" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><script runat="server">  
    protected void Timer1_Tick(object sender, EventArgs e)
    {
        Label1.Text = DateTime.Now.ToString();    }
</script><html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>未命名页面</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:ScriptManager ID="ScriptManager1" runat="server">
        </asp:ScriptManager>
        <br />
    <asp:UpdatePanel ID="UpdatePanel1" runat="server">
        <ContentTemplate>
            <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
        </ContentTemplate>
        <Triggers>
            <asp:AsyncPostBackTrigger ControlID="Timer1" EventName="Tick" />
        </Triggers>
    </asp:UpdatePanel>
        <br />
    <asp:Timer ID="Timer1" runat="server" Interval="1000" ontick="Timer1_Tick">
    </asp:Timer>
        </div>    </form>
</body>
</html>
按道理timer控件每秒更table控件一次.table1控件显示的时间也会不断更新.
可是我这执行后时间不会动.请高手指点一下.