php - Cakephp link alert -

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i have following link delete function in cake:

    <?php echo $this->form->postlink(__(''), array('action' => 'delete', $website['website']['website_id']), array('class' => 'icon-trash   '), null, __('are sure want delete # %s?', $website['website']['website_id'])); ?>

now can see there should message saying: are sure want delete?

but when click link nothing happens (exepect field being deleted ofcourse :p )

so how can make link display confirmation box?

this work

<?php echo $this->form->postlink(__('delete'), array(     'action' => 'delete', $website['website']['website_id']), array(     'class' => 'icon-trash'    ), __('are sure want delete # %s?', $website['website']['website_id'])); ?>

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