Uploading PDF using Media Uploader

please use this code….

(function( $ ) {
        $( '#uploadpdf' ).on( 'click', function() {
            tb_show('Upload the pdf', 'media-upload.php?type=file&TB_iframe=1');

            window.send_to_editor = function( html ) 
            {

                fileurl = $(html).attr('href'); 

                if(/\.pdf\b/.test(fileurl)){
                    $('#pdf').val(fileurl);

                }else{
                    alert('Not a valid pdf file');
                }
                tb_remove();

            }

            return false;
        });


    })(jQuery);
</script>