can javascript tell me if plugins are enabled?

We've got a site where we show people a frameset page. The bottom frame contains text and a few buttons. the top frame directly loads a PDF file (by that, I mean it's not an HTML file with any sort of plugin code, the src attribute of the frame points directly to the PDF file).

If a user has "Run Active X and plugins " disabled, then that top frame just sits empty.

The PDF is downloaded by the browser (which our apache logs confirm), but then the plugin doesn't activate.

Is there a way to tell that this is happening? Because then we could output a link to the PDF file. Clicking the link works, because this would load the PDF in the external Adobe Reader application.

Look at this page and see if you can get anything from the activeX section.

http://www.rgagnon.com/jsdetails/js-0056.html

Eric

This also has other detections:

http://www.javascriptkit.com/script/script2/plugindetect.shtml

Eric