<asp:Button ID="btn_Replie" runat="server" Text="发表回复" 
                OnClick="btn_Replie_Click" EnableTheming="True" onkeydown="ispost();" />用JSfunction ispost()
        {
            if(event.ctrlKey && event.keyCode==13)
            {
                document.getElementById("<%=btn_Replie.ClientID %>").focus();
                document.getElementById("<%=btn_Replie.ClientID %>").click();  
            }
        }怎么让它触发时,调用BUTTON的后台btn_Replie_Click事件!