private void PopupSendMail(string msg)
        {
          string js = "<script language='javascript'>
            alert('" + msg + "');
            function load_url(externallink){
             window.open(externallink,target='_blank')}load_url('"+ mySiteWeb.Url +"');</script>";
            ClientScript.RegisterClientScriptBlock(GetType(), "Register", js);
        }

window.open(externallink,target='_blank')}

window.open(externallink,target='_self)}