Tram.validation =
  setError: ($field, message) ->
    $el = $('<div class="uk-text-danger"></div>').text(message)
    $field.addClass('uk-form-danger')
    $field.after($el)
  unsetError: ($field) ->
    $field.removeClass('uk-form-danger').siblings('.uk-text-danger').remove()
  validateRequired: (field, trim) ->
    $field = $(field)
    val = $field.val()
    val = val.trim() if trim
    if val is ''
      @setError $field, 'This field is required.'
      return false
    else
      return true
  validatePasswords: (field1, field2) ->
    $field1 = $(field1)
    $field2 = $(field2)
    if $field1.val() isnt $field2.val()
      @setError $field2, 'Passwords must match.'
      return false
    else
      return true