var intStopSek = 30;
var intTempSek = 0;
var intNotShow = 0;
var objSek;
//debugging
//eraseCookie('wwwCZAZeitSek');
//eraseCookie('wwwCZAZeitStop');
// cookie schreiben
function createCookie(name,value,hours)
{
	if (hours)
 	{
 		var date = new Date();
 		date.setTime(date.getTime()+(hours*60*60*1000));
 		var expires = "; expires="+date.toGMTString();
 	}
 	else 
 	{	var expires = '';}
 	document.cookie = name+"="+value+expires+"; path=/";
}
// cookie lesen
function readCookie(name)
{
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++)
	{
		var c = ca[i];
		if ( ca[i].substring(0,1) == " " )
		{	c = ca[i].substring(1);}
		if ( c.substring(0,name.length) == name ) 
		{	return c.substring(name.length + 1);}
	}
	return '0';
}
// cookie loeschen
function eraseCookie(name)
{	createCookie(name,"",-1);}
// countdown starten
function startCountdown()
{
	if ( intTempSek < intStopSek )
	{
		intTempSek++;
		createCookie('wwwCZAZeitSek', intTempSek , '2');
		//document.getElementById('ttt').value = intTempSek;
		objSek = window.setTimeout("startCountdown()",1000); 
	}
	else {
		window.clearTimeout(objSek);
		createCookie('wwwCZAZeitStop', '1', '2');
		if (document.getElementById('overlay')) document.getElementById('overlay').style.display = "block";
	}
}
// layer display none
function closeLayer()
{	if (document.getElementById('overlay')) document.getElementById('overlay').style.display = "none";}
// pruefen ob der layer im zeitraum schon angezeigt wurde
intNotShow = readCookie('wwwCZAZeitStop');
if ( intNotShow == 0 )
{
	intTempSek = readCookie('wwwCZAZeitSek');
	if ( intTempSek >= 30 ) intTempSek = 0;
	if (document.getElementById('overlay')) objSek = window.setTimeout("startCountdown()",1000); 
}