reset form after submission

reset form after submission

hi guys,... can anyone help please,... I started new topic since the other one is an php format,... I need to reset form field after submission,... 
here is my form: 
<form action="/photo_comments/report_spam/80" id="ReportComments_80" onsubmit="return false;" update="updateReportPhotoComment_80" method="post" accept-charset="utf-8">
<div style="display:none;"><input type="hidden" name="_method" value="POST"></div>    
<input type="hidden" name="data[Report][sender_id]" value="47" id="ReportSenderId">
<textarea name="data[Report][content]" id="ReportContent"></textarea>
<div class="submit"><input type="submit" value="Report"></div>
</form>

and here is the script that I can't figure out,... 

    <script> 
        $(document).ready(function() { 
    var options = { 
          resetForm: true        // reset the form after successful submit 
    }; 
    $('#ReportComments_<?php echo $photo_comment['PhotoComment']['id'] ?>').ajaxForm(options); 
        }); 
    </script> 

thanks in advance 
chris