function createCookie(name, value) {
	document.cookie = name+"="+value+"; 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 closeBanner() {
        document.getElementById('overlay-banner').style.display = 'none';
        createCookie('bannerClosed', '1');
}
function loadBanner() {
        var closed = readCookie('bannerClosed');
        if (closed != 1) document.getElementById('overlay-banner').style.display = '';
}