'This method adds a select_field option. The kwd dict searched for
the field index which needs to be removed'

def __add_select_field_option(self, trans, current_form, **kwd):

    message = ''
    status = ('ok',)
    index = (-1)
    for (k, v) in kwd.items():
        if (v == 'Add'):
            index = int(k.split('_')[1])
            break
    if (index == (-1)):
        message = ('Error    in    adding    selectfield    option',)
        status = ('error',)
        return (current_form, status, message)
    current_form['fields'][index]['selectlist'].append('')
    return (current_form, status, message)
