Acrobat Reader installed detection via JavaScript

Question

I am curious whether or not Adobe plans on using AcroPDF.PDF.1 as an indicator of the most current version of Adobe Reader (for activeXObjects in Internet Explorer). I know that this will work for detecting whether Reader 7 is installed but now that I think about it, when Reader 8 comes out, if a user already has Reader 7 installed, obviously AcroPDF.PDF.1 will be defined in their registry so eval("new ActiveXObject('AcroPDF.PDF.1')") will return true. Does anyone know, Adobe specifically, how the next version of Reader will be classified in the ActiveX list (or registry key). Will it be AcroPDF.PDF.2?
The reason why I am asking is because I need to detect whether or not our clients have the latest version of Acrobat Reader installed for printing documents from our site. I apologize in advance if the following code looks really messy. This is my first post and I just pasted my code directly into the textarea box. Here's what my detection code looks like and works fine for now (but when Reader 8 comes out....hmmmm):
if(window.ActiveXObject) { // Internet Explorer  var tryReader7 = true;  for (var iVer = 20; iVer >= 0; iVer--) {   try {    if(tryReader7) {     /*********************************************      Check to see if Reader 7 is installed first.     TRUE: Break out of loop     FALSE: Set flag to false so that this check       isn't executed each pass through       by the loop     *********************************************/     tryReader7   = false; // We only want to check ONCE          var Reader7Exists = eval("new ActiveXObject('AcroPDF.PDF.1'); ");     if(Reader7Exists) {      // User met Adobe Reader Version Requirements      oReader.installed = "True";      oReader.version  = max_ReaderVerReq +".0";      oReader.message  = aMessageStatus[4]; //"Adobe® Reader® installed"      oReader.needsUpdate = 0;      break;      }    }        var ReaderExists  = eval("new ActiveXObject('PDF.PdfCtrl." +iVer+ "'); ");    if(ReaderExists) {     // User met Adobe Reader Existence Requirements     oReader.installed = "True";     oReader.version  = iVer + ".0";     oReader.message  = aMessageStatus[4]; //"Adobe® Reader® installed"     break;     }   } catch(e) { // (minimum|maximum) version not detected    oReader.message  = aMessageStatus[7]; //"You do not have the latest Adobe® Reader® installed or enabled.   }   }

Answer 1

I am trying with Reader 9.
I am not trying to print from the server. The printing will happen on the client computers that is why I am trying to print using javascript from an html page. My clients do have different versions of Reader from 6 to latest
Is there any way to achieve it with out installing anything else on the computers?
Thanks,