function PopUp ( url, name, width, height, center, resize, scroll, posleft, postop ) {
    if (posleft != 0) { x = posleft }
    if (postop  != 0) { y = postop  }

    if (!scroll) { scroll = 1 }
    if (!resize) { resize = 0 }

    if ((parseInt (navigator.appVersion) >= 4 ) && (center)) {
      X = (screen.width  - width ) / 2;
      Y = (screen.height - height) / 2;
    }

    if (scroll != 0) { scroll = 1 }

    var extra = 'width=' + width + ', height=' + height + ', top=' + Y + ', left=' + X + ', resizable=' + resize + ', scrollbars=' + scroll + ', location=no, directories=no, status=no, menubar=no, toolbar=no';
    window.open( url, name, extra );
  }