code: function addImportInstructions() {
          var importMessage = "";
  
          if (typeof window.File !== 'undefined' &&
              typeof window.FileReader !== 'undefined' &&
              Modernizr.draganddrop) { /* Chrome & Firefox 4+ */
              importMessage = "<p style='font-size:20px'><strong>Drag <em>&amp;</em> drop a file</strong>, " +
                              "from your system, into this paper sheet.</p><p>Alternatively, you can also " +
                              "upload it here: <input type=file></p>";
  
          } else if (typeof window.FileReader !== 'undefined') { /* Opera? */
              importMessage = "<p style='font-size:20px'><strong>Upload a file</strong>, " +
                              "from your system: <input type=file></p>";
          } else { /* IE */
              importMessage = "<p style='font-size:20px'>Currently, <strong>we don't support file uploads</strong> " +
                              "to our servers.</p><p>Please, copy <em>&amp;</em> paste your file's content or try a "+
                              "different browser, such as Chrome or Firefox.</p>";
          }
  
          $('#paper').html(importMessage);
          $("input:file").uniform({fileDefaultText: 'No file chosen'});
      }
docs: /* Print some instructions on how to upload files in the paper sheet