var currentTime = new Date();
var expiry = new Date();

function getCookie(name) {
	var dc = document.cookie;
	var prefix = name + "=";
	var begin = dc.indexOf("; " + prefix);
	if (begin == -1) {
		begin = dc.indexOf(prefix);
		if (begin != 0) {
			return null;
		}
	} else {
		begin += 2;
	}
	var end = document.cookie.indexOf(";", begin);
	if (end == -1) {
		end = dc.length;
	}
	return unescape(dc.substring(begin + prefix.length, end));
}

function setCookie(name, value) {
	expiry.setTime(currentTime.getTime() + (30 * 24 * 3600 * 1000));
	document.cookie = name + "=" + value + "; expires=" + expiry.toGMTString() + "; path=/";;
}