//Cache control

function updateCounter(Account,Style,TimeOutSeconds) {

var CounterServer='http://www.wvc-net.at/domcount.nsf';
var IncParam='';

// set default timeout
if (TimeOutSeconds=='') TimeOutSeconds=600;
// get current date/time
var now=new Date();
// retrieve existing cookie, if exists
var cookiename='DomCountLastVisit'+Account
var index=document.cookie.indexOf(cookiename);

if (index==-1)

// no cookie present, therefore first visit to page

{
IncParam='&U';
}
else
{
// DomCountLastVisit cookie exists, get date/time value

var countbegin=(document.cookie.indexOf("=",index)+1);
var countend=document.cookie.indexOf(";", index);
if (countend == -1) countend = document.cookie.length;
var LastVisit=new Date(document.cookie.substring(countbegin, countend));

// calculate seconds elapsed between last visit and now
// (N.B. if your page will only be used by recent browsers (IE4/5, NS4), you can
// use the Math.round function below for more precision)
// elapsed=Math.round((now-LastVisit)/1000);

var elapsed=(now-LastVisit)/1000;
if (elapsed<=TimeOutSeconds)
// user still within same session
{
IncParam='';
}
else
// create agent parameter to indicate unique visit
IncParam='&U';
}
// set SRC for IMG tag (will auto-load as soon as this is set)
//document.all[Account].src=CounterServer+"/WebCounter?OpenAgent&S="+Style+"&X="+Account+"&V"+IncParam;
document.Zettl_Blog.src=CounterServer+"/WebCounter?OpenAgent&S="+Style+"&X="+Account+"&V"+IncParam;

// set LastVisit cookie value (after above tests and image loading)
document.cookie=cookiename+"="+now;
}