$prereserve=array();
        $prereserve[] =& HTML_QuickForm::createElement('text','prereserve_time',"");
        $prereserve[] =& HTML_QuickForm::createElement('text','prereserve_room',"");
        $ret=$this->addGroup(&$prereserve, 'prereserve'); // gives the array, below
        //, NULL,NULL,FALSE);
		echo "..".($this->elementExists('prereserve[prereserve_time]')).".."; // echoes "...."
		
		$this->addGroupRule('prereserve',get_vocab("errfield_selected_date_invalid"),'required');
		$this->addRule(array('prereserve[prereserve_time]','prereserve_room'),
		               get_vocab("errfield_selected_date_invalid"),'callback',"make_prereservation");
        //, NULL, NULL, TRUE
		if (PEAR::isError($ret)) { 
		    echo $ret->getMessage();
		    echo $ret->getUserInfo();
		    //var_dump($ret);
		}





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
        )

)