function CloseWerbelayer() {
 document.getElementById('werbelayer').style.visibility='hidden';
 werbelayerhideframe.location.href = 'werbelayerhide.php';
}

function CountdownWerbelayer(sekunden) {
 window.setTimeout("ShowWerbelayer()", sekunden); 
}

function ShowWerbelayer() {
 document.getElementById('werbelayer').style.visibility='visible';
}