按钮可以正确提交，但是<a>的连接怎么都提交不了，何解？

        $(function() {
            $('#submit').button().click(function() {
                $('#action').val('add');
                $('#commentform').submit();
            });
            
            $('a#comment-delete').click(function(){
                $('#action').val('delete');
                $('#key').val($(this).attr('title'));
                $('#commentform').submit();
            });
        });

<a id="comment-delete" href="#" title="9">Delete</a>

<form action="/comment" method="post" id="commentform">
    <input type="hidden" name="action" id="action"/>
    <input type="hidden" name="key" id="key"/>
    。。。。
    <button id="submit">Submit Comment</button>
</form>
--
修改:neek2000 FROM 221.223.85.*
FROM 221.223.85.*