function getCookie (name) {
	var dc = document.cookie;
	var cname = name + "=";
	var clen = dc.length;
	var cbegin = 0;

	while (cbegin < clen) {
		var vbegin = cbegin + cname.length;
		if (dc.substring(cbegin, vbegin) == cname) {
			var vend = dc.indexOf (";", vbegin);
			if (vend == -1) vend = clen;
			return unescape(dc.substring(vbegin, vend));
		}
		cbegin = dc.indexOf(" ", cbegin) + 1;
		if (cbegin== 0) break;
	}
	return null;
}