/**
  *	create html form 
  *
  *	@param array $errors	array with error messages
  *	@return null			FALSE on failure
  */
 function create_html_form(&$errors)
 {
     global $lang_str, $sess;
     parent::create_html_form($errors);
     /* get list of attributes */
     $this->attrs =& Attr_types::singleton();
     if (false === ($at = $this->attrs->get_attr_types())) {
         return false;
     }
     if (false === ($grp = $this->attrs->get_attr_groups())) {
         return false;
     }
     $this->attr_groups = $grp;
     $grp[] = array("label" => "< " . $lang_str['attr_grp_create_new'] . " >", "value" => "__new__");
     $grp_cnt = count($grp) - 1;
     /* default values for form elements */
     if ($this->edit_id and isset($at[$this->edit_id])) {
         $atr =& $at[$this->edit_id];
     } else {
         $atr = new Attr_type("", 2, "string", "", "", 0, 0, 0, 0, 0);
     }
     $this->f->add_element(array("type" => "text", "name" => "attr_name", "size" => 16, "maxlength" => 32, "value" => $atr->get_name(), "minlength" => 1, "length_e" => $lang_str['fe_not_filled_name_of_attribute']));
     $this->f->add_element(array("type" => "select", "name" => "attr_type", "size" => 1, "options" => Attr_types::get_all_types(), "value" => $atr->get_type()));
     $this->f->add_element(array("type" => "text", "name" => "attr_order", "size" => 16, "maxlength" => 5, "value" => $atr->get_order(), "valid_regex" => "^[0-9]+\$", "valid_e" => $lang_str['fe_order_is_not_number']));
     $this->f->add_element(array("type" => "text", "name" => "attr_label", "size" => 16, "maxlength" => 255, "value" => $atr->get_raw_description()));
     $this->f->add_element(array("type" => "select", "name" => "attr_access", "size" => 1, "options" => $atr->get_access_options(), "value" => $atr->get_access()));
     $this->f->add_element(array("type" => "select", "name" => "attr_group", "size" => 1, "options" => $grp, "value" => $atr->get_group(), "extrahtml" => "onchange='if (this.selectedIndex==" . $grp_cnt . "){this.form.attr_new_group.disabled=false; this.form.attr_new_group.focus();}else{this.form.attr_new_group.disabled=true;}'"));
     $this->f->add_element(array("type" => "text", "name" => "attr_new_group", "size" => 16, "value" => "", "disabled" => true));
     $this->f->add_element(array("type" => "checkbox", "name" => "for_ser", "value" => "1", "checked" => $atr->is_for_ser()));
     $this->f->add_element(array("type" => "checkbox", "name" => "for_serweb", "value" => "1", "checked" => $atr->is_for_serweb()));
     $this->f->add_element(array("type" => "checkbox", "name" => "pr_uri", "value" => "1", "checked" => $atr->is_for_URIs()));
     $this->f->add_element(array("type" => "checkbox", "name" => "pr_user", "value" => "1", "checked" => $atr->is_for_users()));
     $this->f->add_element(array("type" => "checkbox", "name" => "pr_domain", "value" => "1", "checked" => $atr->is_for_domains()));
     $this->f->add_element(array("type" => "checkbox", "name" => "pr_global", "value" => "1", "checked" => $atr->is_for_globals()));
     $this->f->add_element(array("type" => "checkbox", "name" => "multivalue", "value" => "1", "checked" => $atr->is_multivalue()));
     $this->f->add_element(array("type" => "checkbox", "name" => "registration", "value" => "1", "checked" => $atr->fill_on_register()));
     $this->f->add_element(array("type" => "checkbox", "name" => "required", "value" => "1", "checked" => $atr->is_required()));
     $this->f->add_element(array("type" => "hidden", "name" => "edit_id", "value" => $this->edit_id));
     if ($atr->apu_edit()) {
         $this->f->add_extra_submit('extended_settings', $this->opt['form_submit_extended']);
     }
     /* Instantiate page controler object */
     $onload_js = "\n            var at_ctl;\n            at_ctl = new Attr_types_ctl('at_ctl', " . my_JSON_encode($lang_str) . ", '" . js_escape($sess->url($_SERVER['PHP_SELF'] . "?kvrk=" . uniqID("") . "&rename_group=1")) . "');";
     $this->controler->set_onload_js($onload_js);
 }