JQuery菜单鼠标滑过中文变成英文 双击可复制

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>    
<ul class="nav">        
<li><a href="#" rel="ENGLISH">中文</a></li>        
<li><a href="#" rel="lisi">李四</a></li>        
</ul>        
                
<script type="text/javascript">        
$(document).ready(function(){        
$(".nav a").hover( function() {        
 t = $(this).text();        
 $(this).text($(this).attr('rel'));        
$(this).attr('rel',t);        
}, function() {        
 t = $(this).text();        
 $(this).text($(this).attr('rel'));        
 $(this).attr('rel',t);        
 });        
 });        
 </script>