code: def find_field(browser, field, value):
      
      return find_field_by_id(browser, field, value) + \
          find_field_by_name(browser, field, value) + \
          find_field_by_label(browser, field, value)
docs: Locate an input field of a given value
  
      This first looks for the value as the id of the element, then
      the name of the element, then a label for the element.