           $orig = $(attr)
           $orig.after($orig.clone(true))
           attr
-        else if not _.isEmpty(attr) and (_.isArray(attr) or typeof attr is 'object')
+        else if !_.isEmpty(attr) and (_.isArray(attr) or typeof attr is 'object')
           toForm(attr, key)
-        else if not "#{key}".match(/^_/) and attr? and typeof attr isnt 'object' and typeof attr isnt 'function'
+        else if !"#{key}".match(/^_/) and attr? and typeof attr isnt 'object' and typeof attr isnt 'function'
           $el = $ "<input/>",
             name: key
             value: attr


      if iframeBody.className is "error"
        options.error?(response)
      else
        options.success?(response)

      $iframe.remove()
      $form.remove()

    $iframe[0].onload = callback

    $form[0].submit()
    dfd

  Backbone.sync = (method, model, options) ->
    if options?.multipart
