if(typeof(pvhitimgview)=="undefined"){
	var pvhitimgview=true;
	function pv_rport(dm,f) {
	  var i = dm.indexOf(f);
	  if (i > 0) {
	    return  dm.substring(0, i);
	  }
	  return dm;
	}
 function getDomain()
   {
		hn=location.hostname;
		str=hn.replace(/\.(com|net|org|cn$)\.?.*/,"");
		if(str.lastIndexOf(".") == -1)
			dm = "." + hn;
		else
		{
			str = str.substring(str.lastIndexOf("."));
			dm = hn.substring(hn.lastIndexOf(str));
		}
		return dm;
   }
	
  function readck(name){
	var cookieValue = "";
	var search_s = name + "=";
   if(document.cookie.length > 0)
   { 
    offset = document.cookie.indexOf(search_s);
    if (offset != -1)
    { 
      offset += search_s.length;
      end = document.cookie.indexOf(";", offset);
      if (end == -1) end = document.cookie.length;
      cookieValue = unescape(document.cookie.substring(offset, end))
    }
   }
   return cookieValue;
  }
  function writeck(name, value, hours)
  {
    var expire = "";
    dm = getDomain();
    if(hours != null)
    {
    expire = new Date((new Date()).getTime() + hours * 3600000);
    expire = "; expires=" + expire.toGMTString();
    }
    document.cookie = name + "=" + escape(value) + expire + ";domain=" + dm + ";path=/; ";
  }
  
  function randck(){
    return Math.floor(Math.random()*255);
  }
	var imgsrc='';
	function pv_d(){
		var now = new Date().getTime();
	  	var datestr=escape(now*1000+Math.round(Math.random()*1000));
			  	
		if(top.location==self.location){
			imgsrc='http://pvsite.zol.com.cn/images/pvhit0001.gif?t='+datestr+'&'+document.referrer;
		}else {
			var d=document.referrer+'';
			d=d.substr(7);
			d=pv_rport(d,'/');
			d=pv_rport(d,':');
			
			if(d.substr(d.length-9)=='2u.com.cn' || d.substr(d.length-10)=='google.com' || d.substr(d.length-9)=='qihoo.com' || d.substr(d.length-9)=='baidu.com'|| d.substr(d.length-8)=='3721.com')
				imgsrc='http://pvsite.zol.com.cn/images/pvhit0002.gif?t='+datestr+'&'+document.referrer;
			else imgsrc='';
		}
		
                if(imgsrc!='')
                {
			var ck = readck('ip_ck');
                        document.write('<script type="text/javascript" src="http://js.2u.com.cn/p.ht?h=&t=&c='+ ck +'"></script>');
                }
	}

	pv_d();
}