最近开发了一个定时刷新新浪微博的功能，简单实现如下

 <iframe id="weibo_zy_id" width="100%" height="500"  frameborder="0" scrolling="no" class="lazyload" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC" data-original="http://weibo.com"></iframe>

jquery每15秒钟刷新一次iframe

  <script language="javascript" >
     function refreshWeibo(){
        var mframe=$('#weibo_zy_id').attr("src");
        $("#weibo_zy_id").attr("src",mframe);
     }
     setInterval("refreshWeibo()",15000);
 </script>

在FF和IE浏览器上已测试通过。