function displayOverlay () {
	var immo_body = document.getElementById('web_body');
	var cW = immo_body.clientWidth;
	var cH = immo_body.clientHeight;
	var overlay = document.getElementById('overlay');
	var overlayInner = document.getElementById('overlayInner');
	if(overlay) {
		overlay.style.display = "block";
		overlay.style.width = overlayInner.style.width = cW + 'px';
		overlay.style.height = overlayInner.style.height = cH + 'px';
	}
}					
				
function hideBanner(){
	var overlay = document.getElementById('overlay');
	overlay.style.display = "none";
}
function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) {
	createCookie(name,"",-1);
}