QuickForm and Validation

Hello, I've got two problems. First, I need to validate a date. I'm using this to add my date to the form : $options = array( 'language' => 'fr', 'format' => 'dmY', 'minYear' => 2004, 'maxYear' => 2014); $Date =& HTML_QuickForm::CreateElement('date','Date','Date :',$options); $form->addElement($Date); But I can't find a Rule to say that '31/02/2004' is not valide and throw me an error on the form. And second, I want to disable the rule for one of my button submit. I'm using this code : $Btn[] =& HTML_QuickForm::CreateElement('submit','Action','Modifier'); $Btn[] =& HTML_QuickForm::CreateElement('submit','Action','Supprimer'); $form->addGroup($Btn,'Btn','',' ',false); I want that my rules apply when I click on Modifier but not on Supprimer. Please help me, I read the documentation and find no way to solve my problem Thanks a lot for your answer.