ajax submit and reset form after submission

hi guys,... is there a way to reset form after ajax submission...? or do I have to go thru jquery submission? 

here is my form: 

<?php echo $this->Form->create('PhotoComment'); ?> 

    <?php echo $form->hidden('user_id', array('value' => $user_object['id'])) ?>

<?php  echo $this->Form->textarea('content', array('rows' => '3')); ?>

<?php echo $ajax->submit('Add', array('url'=> array('controller'=>'photo_comments', 'action'=>'ajax_add/'. $photo['Photo']['id'] ), 'update' => 'updateDiv')); ?> 

     <div class="clr"></div>

<div id="updateDiv" style="margin: 10px 0 10px 0;"></div> 

thanks in advance 

chris 

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