function macromedia_flash() {
  var flash_ok = false;
  if (navigator.userAgent.toLowerCase().indexOf("msie") > -1
      && navigator.platform=="Win32")
    flash_ok = true;
  else {
    if (navigator.mimeTypes &&
      navigator.mimeTypes["application/x-shockwave-flash"]&&
      navigator.mimeTypes["application/x-shockwave-flash"].enabledPlugin) {
      var d = navigator.mimeTypes["application/x-shockwave-flash"].enabledPlugin.description;
      if (d.indexOf(".") > -1) {
        var hauptversion = parseInt(d.substring(d.indexOf(".")-1, d.indexOf(".")));
        var unterversion = parseInt(d.substring(d.indexOf(".")+1, d.indexOf(".")+2));
        var flash_ok = (hauptversion >= 5);
      }
    }
  }
  return flash_ok;
}