function navi_win(url_name) {
  self.window.name="main"
  w = window.open("", "NAVI", "width=604,height=649,toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no");
  if (w != null) {
    if (w.opener == null) {
      w.opener = self;
    }
    w.location.href = url_name;
                       //↑ ナビウインドウのURL
  }
}