这个方法在万戈的《记录并隐藏 Wordpress 评论者信息》和木木的《利用jQuery提高访客评论的用户体验》两篇文章里都有详尽的使用说明，我这里只是解决了一个bug，更新一下。
原理：
使用jQuery，在来访者留言之后，通过判断浏览器里访客 Cookies，让访客第二次回访时，隐藏来访者昵称、邮箱、网址输入框，并显示来访者头像+欢迎##归来！字样，如同管理员登陆时的状态一样， 访客还可以选择修改相关资料再进行评论. 给予访客很好的用户体验。
方法：
首先，编辑comments.php，在
<input id="author" name="author" size="22" type="text" value="<?php echo $comment_author; ?>" tabindex="1" />
评论者姓名输入框代码上方添加：
然后再把三个评论者姓名、电邮、网址的代码输入框用<div id=”author_info”></div>
包起来，到此，comments.php 修改结束；
然后，新建一个名为 infohide 的 js 文件，把以下代码放进去：
$(document).ready(function() { //开始 if($('input#author[value]').length>0){ //判断用户框是否有值 $("#author_info").css('display','none'); //将id为author_info的对象的display属性设为none，即隐藏 var change='<span id="show_author_info" style="cursor: pointer; color: #2970a6;">change »</span>'; //定义change，style是定义CSS样式，让他有超链接的效果，color要根据你自己的来改，当然你也可以在CSS中定义#show_author_info来实现，这样是为了不用再去修改style.css而已！ var close='<span id="hide_author_info" style="cursor: pointer; color: #2970a6;">close »</span>'; //定义close $('#welcome').append(change); //在ID为welcome的对象里添加刚刚定义的change $('#welcome').append(close); // 添加close $('#hide_author_info').css('display','none'); //隐藏close $('#show_author_info').click(function() { //鼠标点击change时发生的事件 $('#author_info').slideDown('slow'); //用户输入框向下滑出 $('#show_author_info').css('display','none'); //隐藏change $('#hide_author_info').css('display','inline'); //显示close $('#hide_author_info').click(function() { // 鼠标点击close时发生的事件 $('#author_info').slideUp('slow'); //用户输入框向上滑 $('#hide_author_info').css('display','none'); //隐藏close $('#show_author_info').css('display','inline'); })})}}) //显示change
保存文件至主题目录下。
最后，在head.php 中加载 JQuery 和以上 infohide.js：
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js" type="text/javascript"><!--mce:0--></script> <script src="<?php bloginfo('template_url'); ?" type="text/javascript"><!--mce:1--></script>
至此，用 JQuery 隐藏回访者资料输入框的功能就实现了！
bug解决：
但我加上这个功能后发现在firefox浏览器里有bug：正常的情况，没有来访者的Cookies时，资料输入框应该是显示的；而在firefox里资料输入框却隐藏了，来访者想评论，却输入不了个人信息，评论也就提交不了！
而且这个bug在有的主题下不会出现，我现在的主题就有问题。
经过几番折腾，发现infohide.js里面判断输入框里是否有值
if($('input#author[value]').length>0){
有问题，应该是代码不规范所致，修改代码如下：
if($('#author').val()!=""){
经测试完美解决不支持firefox浏览器的问题，如果你的主题也是出现firefox的bug，那么可以替换这段代码解决，嘿嘿…
收工！！！
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留个言，记录一下试试
欢迎奶牛归来，这个挺不错的，嘿嘿
[ 小牆判斷這是Spam! ]
呃，奶牛被当Spam了~~~
唉，评论有问题，杯具啊，难为奶牛那么积极的留言了
很强大
被判断为垃圾评论了?比较无奈.第一次看到这个功能的方法
致歉！小墙代码插错行了，导致见评论就墙，真后悔没测试啊，杯具！现在已经可以评论了，欢迎常来坐坐，嘿嘿
奶牛前几天在网上闲逛的时候发现了一个博客的留言的地方设置的挺贴心的，就是在“你的网站”后面又添加了一个“设置头像”的链接到了gravatar的设置头像的页面，感觉这样子也可以给用户很好的体验 ，嘿嘿;-)
恩，看到奶牛已经添加“设置头像”功能了，很贴心的说
呵呵 我的已经加过了~
哦，我还以为是我的cach插件导致出错，原来是代码不规则的原因啊，我晕～～～～非常感谢～～～
我来试试
从老万那里顺藤摸瓜就过来了，呵呵。真的找到解决问题的办法了，赞一个！
想看看什么效果
马克一下。明天来折腾一下。
哈哈，，这个就是你现在的效果。。。会有保存登入状态
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