好久没写代码，望高人解惑！！！送上300分

function gv_cnzz(of){

	var es = document.cookie.indexOf(";",of);

	if(es==-1) es=document.cookie.length;

	return unescape(document.cookie.substring(of,es));

}

function gc_cnzz(n){

	var arg=n+"=";

	var alen=arg.length;

	var clen=document.cookie.length;

	var i=0;

	while(i<clen){

	var j=i+alen;

	if(document.cookie.substring(i,j)==arg) return gv_cnzz(j);

	i=document.cookie.indexOf(" ",i)+1;

	if(i==0)	break;

	}

	return -1;

}

var cnzz_ed=new Date();

var cnzz_now=parseInt(cnzz_ed.getTime());

var cnzz_ref=document.referrer;

var cnzz_data='&r='+escape(cnzz_ref.substr(0,512))+'&lg='+escape(navigator.systemLanguage)+'&ntime=0.47159800 1294413088';

var cnzz_a=gc_cnzz("cnzz_a1231233");

if(cnzz_a!=-1) cnzz_a=parseInt(cnzz_a)+1;

else cnzz_a=0;

var rt=parseInt(gc_cnzz("rtime"));

var lt=parseInt(gc_cnzz("ltime"));

var cnzz_st = parseInt((cnzz_now-lt)/1000);

var cnzz_sin = gc_cnzz("sin1231233");

if(cnzz_sin==-1) cnzz_sin='none';

if( cnzz_ref.split('/')[2]!=document.domain ) cnzz_sin=cnzz_ref;

var cnzz_eid=gc_cnzz("cnzz_eid");

if(cnzz_eid==-1) cnzz_eid=Math.floor(Math.random()*100000000)+"-"+1294413088+"-"+cnzz_ref.substr(0,64);

if(lt<1000000){rt=0;lt=0;}

if(rt<1) rt=0;

if(((cnzz_now-lt)>500*86400)&&(lt>0)) rt++;

cnzz_data=cnzz_data+'&repeatip='+cnzz_a+'&rtime='+rt+'&cnzz_eid='+escape(cnzz_eid)+'&showp='+escape(screen.width+'x'+screen.height)+'&st='+cnzz_st+'&sin='+escape(cnzz_sin.substr(0,512))+'&res=0';

document.write('<a href="http://www.cnzz.com/stat/website.php?web_id=1231233" target=_blank title="站长统计"><img border=0 hspace=0 vspace=0 src="http://icon.cnzz.com/pic1.gif" /></a>');

document.write('<img src="http://zs3.cnzz.com/stat.htm?id=1231233'+cnzz_data+'" border=0 width=0 height=0 />');



var cnzz_et=(86400-cnzz_ed.getHours()*3600-cnzz_ed.getMinutes()*60-cnzz_ed.getSeconds());

cnzz_ed.setTime(cnzz_now+1000*(cnzz_et-cnzz_ed.getTimezoneOffset()*60));

document.cookie="cnzz_a1231233="+cnzz_a+";expires="+cnzz_ed.toGMTString()+ "; path=/";

document.cookie="sin1231233="+escape(cnzz_sin)+ ";expires="+cnzz_ed.toGMTString()+";path=/";

cnzz_ed.setTime(cnzz_now+1000*86400*182);

document.cookie="rtime="+rt+";expires="+cnzz_ed.toGMTString()+ ";path=/";

document.cookie="ltime="+cnzz_now+";expires=" + cnzz_ed.toGMTString()+ ";path=/";

document.cookie="cnzz_eid="+escape(cnzz_eid)+ ";expires="+cnzz_ed.toGMTString()+";path=/";