Open Radwindow o window.open Passing parameters

<telerik:RadButton ID="Imprimir" runat="server" Text="Imprimir" ButtonType="LinkButton" Image-ImageUrl ="imgs/printerOld.png" Visible="False" OnClientClicking = "openRadWindow" Height="32px" Width="32px" > </telerik:RadButton>


<script type="text/javascript">
        function openRadWindow(button, args) {
           // radopen(button.get_navigateUrl(), "Tranfer");
            window.open(button.get_navigateUrl(), "_blank", "toolbar=yes, location=no, directories=no, status=no, menubar=yes, scrollbars=yes, resizable=yes, copyhistory=yes");
            args.set_cancel(true);
        }
    </script>


 Protected Sub btnreg_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnreg.Click
        Imprimir.NavigateUrl = "frm_transf.aspx?BatNbr=" + Batnbr
End Sub