onserverclick

                    <button type="button" id="Log_Submit" runat="server" runat="server" runat="server"　onserverclick="btnLogin_Click" onclick="return CheckUserDataValid();" style="margin: 0px auto;
                                                display: table;" class="width-35  btn btn-sm btn-primary">
                                                <i class="ace-icon fa fa-key"></i><span class="bigger-110">登录</span>
                                            </button>