jquery判断cookie是否存在

<script src="http://code.jquery.com/jquery-latest.js"></script>
<script src="http://files.cnblogs.com/afish/jquery.cookie.js"></script>
<script>
$(document).ready(function(){
    if($.cookie(".DottextCookie")!=null){
        $("#mynotice").append(‘<a href="http://i.cnblogs.com/EditPosts.aspx?opt=1" target="_blank">写文章</a><br />‘);
    };
});
</script>