Učitavanje pdf-a u HTML stranicu

Code:

<!DOCTYPE html>
<html lang="en">
    <head>
        <title>PDF demo</title>
        <script src="http://code.jquery.com/jquery-1.9.1.min.js"></script>
        <script src="https://raw.github.com/mozilla/pdf.js/gh-pages/build/pdf.js"></script>
    </head>
    <body>
        <select id="pageSelector">
        </select>
        <div class="pdf">
            <canvas id="pdfCanvas"/>
        </div>
        <script type="text/javascript">
            $(document).ready(function() {

                var url = 'test.pdf';
                PDFJS.disableWorker = true;

                // ucitavamo PDF i punimo dropdown list
                PDFJS.getDocument(url).then(function(pdf) {
                    var numberOfPages = pdf.numPages;
                    for (var i = 1; i <= numberOfPages; i++) {
                        $('<option/>').val(i).html(i).appendTo('#pageSelector');
                    }
                });

                // prikazujemo prvu stranu
                displayPage(1);

                // kada se promeni vrednost u dropdown listi, prikazujemo odgovarajucu stranu
                $('#pageSelector').change(function() {
                    var value = $(this).val();
                    displayPage(value);
                });

                // funkcija za prikazivanje jedne strane
                function displayPage(pageNum) {
                    PDFJS.getDocument(url).then(function(pdf) {
                        pdf.getPage(pageNum).then(function(page) {
                            var scale = 1;
                            var viewport = page.getViewport(scale);

                            var canvas = document.getElementById('pdfCanvas');
                            var context = canvas.getContext('2d');
                            canvas.height = viewport.height;
                            canvas.width = viewport.width;

                            page.render({ canvasContext: context, viewport: viewport });
                        });
                    });
                }
            });
         </script>
    </body>
</html>