useFlash = 0;
if (flashVer) {
  var plugin = (navigator.mimeTypes && navigator.mimeTypes["application/x-shockwave-flash"] ? navigator.mimeTypes["application/x-shockwave-flash"].enabledPlugin : 0);
  useFlash = (plugin && parseInt(plugin.description.substring(plugin.description.indexOf(".")-1)) >= flashVer);
}