权限被拒绝访问财产IFRAME

我有我的jsp页面的链接。

I have a link in my jsp page .

链接看起来像这样

<a href="javascript:doSomething('abc.ff' , 'abc.ff?m=1')">

JavaScript的code

the javascript code

    function doSomething(url, url_progress){
    parent.win1.location.href = url;    
    /* Wait until something surely has started! */
    window.setTimeout("this.startFinally()", 1000); 
    this.startFinally = function (){
    location.href = url_progress;
      }
    }

在这个用户clinks clinks一切工作正常。现在，最近我把这个code一个iframe内，然后什么也没有发生。我问过萤火虫，并得到这个错误：

When the user clinks on this clinks everything works fine. Now recently I put this code inside a Iframe and then nothing happens. I checked with firebug and got this error :

   Permission denied to access property 'win1'
   [Break On This Error] parent.win1.location.href = url; 

可能是什么问题？

What can be the problem?