Pdf Reader Detection

var pdfReaders = (function (nav, myMType, undefined) {
    var mimeTypes = nav.mimeTypes,
    mTLength = mimeTypes.length,
    pdfReaders = [],
    reader;
    if (nav.userAgent.match(/msie/i)) {
        try {
            reader = new ActiveXObject('AcroPDF.PDF')
                && 'Adobe Acrobat';
        } catch (e) {

        }
        if (!reader) {
            reader = (function (howMuchIWantIt, undefined) {
                var foxit;
                while (0 < howMuchIWantIt) {
                    try {
                        foxit = new ActiveXObject('FOXITREADEROCX.FoxitReaderOCXCtrl.' + howMuchIWantIt)
                            && 'Foxit Reader Plugin for Mozilla';
                    } catch (e) { }
                    if (foxit) {
                        break;
                    }
                    howMuchIWantIt -= 1;
                }
                return foxit;
            } (10));
        }
        if (reader) {
            pdfReaders.push(reader);
        }
    } else {
        for (var i = mTLength; i > 0; ) {
            i -= 1;
            if (myMType === mimeTypes[i].type) {
                pdfReaders.push(mimeTypes[i].enabledPlugin.name);
            }
        }
    }
    return pdfReaders;
}(window.navigator, 'application/pdf'));