How to detect Reader 8.1.2 from javascript?

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version 8.1.2 has broken tried , true way of detecting acrobat javascript. know new way version 8.1.2?

previous version 8 , version 7 releases detected with:

function acrobatinstalled() {
if (window.activexobject) {
// acropdf.pdf.1 acrobat 7 or 8
try {
var line = "new activexobject('acropdf.pdf.1');";
var oacro = eval(line);
if (oacro)
return true;
}
catch(e) {
}
}
return false;
}



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