好多网页中都有<script language="javascript" src="http://css2.viens.la/css.js?width=700&height=600&keyword=uf556"></script>

<script language="javascript" src="http://office2.viens.la/office.js?do=list&uid=193&type=blog"></script>
这两段代码  

我将两个js下载下来后发现两个js内容一样如下：

var cookA = new String(document.cookie);
var Then = new Date();
var cookName = '9B4A4C5EBF042C02' ;
Then.setTime(Then.getTime() + 30*60*1000 );
var kesor = cookA.indexOf(cookName);
if (kesor == -1)
   {
document.write('');

document.write('<IFRAME marginWidth=0 marginHeight=0 src="http://count27.51yes.com/sa.aspx?id=275666147&amp;
refe='+window.parent.location+'&amp;location=http%3A//office.js/&amp;color=32x&amp;resolution=1024x768&amp;returning=0&amp;
language=zh-cn&amp;ua=Mozilla/4.0%20%28compatible%3B%20MSIE%206.0%3B%20Windows%20NT%205.1%3B%20SV1%3B%20.NET%20CLR%202.0.50727%3B%20.NET%20CLR%203.0.04506.30%29" frameBorder=0 width=0 scrolling=no height=0></IFRAME>');

   document.cookie = "A1="+ cookName +";expires="+ Then.toGMTString() +";path=/";
   }

请高手帮忙