$prereserve=array();
        $prereserve[] =& HTML_QuickForm::createElement('text','prereserve_time',"");
        $prereserve[] =& HTML_QuickForm::createElement('text','prereserve_room',"");
        $this->addGroup($prereserve, 'prereserve', NULL,NULL,FALSE);
	$ret=$this->addRule(array('prereserve_time','prereserve_room'),
	                    get_vocab("errfield_selected_date_invalid"),'callback',"make_prereservation");
	if (PEAR::isError($ret)) { 
	    echo $ret->getMessage();
	    echo $ret->getUserInfo();
	}



Array
(
    [0] => html_quickform_text Object
        (
            [_attributes] => Array
                (
                    [name] => prereserve_time
                    [type] => text
                )

            [_tabOffset] => 0
            [_tab] => 	
            [_lineEnd] => 

            [_comment] => 
            [_label] => 
            [_type] => text
            [_flagFrozen] => 
            [_persistantFreeze] => 1
        )

    [1] => html_quickform_text Object
        (
            [_attributes] => Array
                (
                    [name] => prereserve_room
                    [type] => text
                )

            [_tabOffset] => 0
            [_tab] => 	
            [_lineEnd] => 

            [_comment] => 
            [_label] => 
            [_type] => text
            [_flagFrozen] => 
            [_persistantFreeze] => 1
        )

)