Question to Adobe: Ruling out non-Adobe viewers via Acrobat Javascript

Hi,

***I would like to address this question to Adobe Acrobat developers:****

I'd like to add a doc-level javascript (thru another script) that will check the viewer type, and if it neither Acrobat (6 and higher) nor Reader, the document will close.

So I wrote:

...

this.addScript("CheckViewer", "var viewer = app.viewerType;\
     if ((viewer !== \"Exchange-Pro\") && (viewer !==\"Reader\"))\
     {app.alert(\"This Document Requires Adobe Reader or Acrobat Version 10 or Later.\");\
    this.closeDoc(true);}");

The script is correctly placed in the document, BUT if I open the document in Foxit Reader, for example, nothing happens just because Foxit disguises itself as "Reader". Is there a way to overcome this problem?

I think, the best way would be to change the Acrobat Javascript API so that  app.viewerType values will be: Adobe_Exchange-Pro, Adobe_Exchange, and Adobe_Reader.

I would appreciate your advice!