====== jQuery 实现在新窗口中打开链接 ======

<code javascript>

 <script src="http://code.jquery.com/jquery-latest.js"></script>
 <script type="text/javascript">
   // open url in new a window
   $(document).ready(function(){
     $("a").attr("target", "_blank");
   });
 </script>

</code>

===== 在新窗口中打开外部链接 =====
<code javascript>

$('a[href^="http://"]')
  .attr("target", "_blank");

</code>