One of these tiny details is checking that the Flash plug-in is installed in Mac or Windows Navigator. The following function, Flash_checkForPlugIn(), does exactly that. It checks that the mimeTypes object exists, that one of the mime types is flash, and that its relevant plug-in is enabled. The function also extracts the plug-in version, and checks that it is higher than the default minimum player version. The default minimum player version is set as a global variable before calling Flash_checkForPlugIn(). Here is the function in full, remember that it must be preceded by the global variable assignment of minPlayer:

function Flash_checkForPlugIn() {
  var plugin = (navigator.mimeTypes &&
  navigator.mimeTypes["application/x-shockwave-flash"]) ?
  navigator.mimeTypes["application/x-shockwave-flash"].enabledPlugin : 0;
  if (plugin) {
    var pluginversion =    
  parseInt(plugin.description.substring(plugin.description.indexOf(".")-1)) 
  if(pluginversion >= minPlayer) {return true;}
  }
  return false;
}

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