function updateCounter(Account, Style, TimeOutSeconds) {
	var CounterServer='http://www.alphaprojet.com/web/counters/alphaprojet.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='GEPCountLastVisit'+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)
		var elapsed=Math.round((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.getElementById(Account).src=CounterServer+"/WebCounter?OpenAgent&S="+Style+"&X="+Account+"&V"+IncParam;
	
	// set LastVisit cookie value (after above tests and image loading)
	document.cookie=cookiename+"="+now;
}