title: Uploadify v3.1 passing POST Data
body: <p>Iam getting Crazy with JQuery Uploadify V3.1.</p>
  
  <pre><code>// setup fileuploader
  $("#file_upload").uploadify({
      'swf': 'flash/uploadify.swf',
      'uploader' : 'upload/do-upload',
      'debug' : false,
      'buttonText': 'Files auswählen',
      'multi': true,
      'method': 'POST',
      'auto': false,
      'width': 250,
      'queueSizeLimit' : 10,
      'fileSizeLimit' : '100MB',
      'cancelImg': 'img/uploadify-cancel.png',
      'removeCompleted' : true,
      'onUploadSuccess' : function(file, data, response) {
          $('#message').append(data);
      },
      'onUploadError' : function() {
          $('#message').html('&lt;h2&gt;Fehler beim Upload&lt;/h2&gt;');
      }
  });
  </code></pre>
  
  <p>To start Download onClick </p>
  
  <pre><code>// handle the event stuff
  $("#event_start_upload").on({
      click: function(){
          var key = $('#key').val();
  
          if (key.length &lt; KeyLength) {
              $('#form-encryption-control').addClass('error');
              return;
          } else {
              $('#form-encryption-control').removeClass('error');
          }
          // some space for new download links
          $('#message').empty();
          $('#file_upload').uploadify('upload','*')
      }
  });
  </code></pre>
  
  <p>My Problem is: I have to pass addtional params to the serverSide, in Uploadify V2 there was an Method uploadifySettings to pass "scriptData" , but not in V3? Someone knows how this works?</p>
  
  <p>If someone else needs the clue:</p>
  
  <pre><code>'onUploadStart' : function(file) {
              var key = $('#key').val();
              $("#file_upload").uploadify('settings', 'formData', {'key' : key});
          },
  </code></pre>