CoffeeScript: Confine form input tabbing to a group of inputs

gistfile1.coffee

  disableForms: (page) ->
    @formInputs = page.$el.find('input[tabindex], textarea[tabindex]')
    @formInputs.off 'keydown', @handleTab
    @formInputs.blur()

  enableForms: (page) ->
    @formInputs = page.$el.find('input[tabindex], textarea[tabindex]')
    @formInputs.on 'keydown', @handleTab

  handleTab: (e) =>
    if e.keyCode == 9
      e.preventDefault();
      for i in [[email protected]] by 1
        if @formInputs[i] == e.target
          $(@formInputs[(i+1)%@formInputs.length]).focus()