function GetCookie (name, d) {
	if (!d) var d = null;
	var arg = name + "=";
	var alen = arg.length;
	var clen = document.cookie.length;
	var i = 0;
	while (i < clen) {
		var j = i + alen;
		if (document.cookie.substring(i, j) == arg) {
			var endstr = document.cookie.indexOf (";", j);
			if (endstr == -1) endstr = document.cookie.length;
			return unescape(document.cookie.substring(j, endstr));
 		}
		i = document.cookie.indexOf(" ", i) + 1;
		if (i == 0) break;
	}
	return d;
}

function SetCookie (name, value, expires) {
	if (expires) {
		var exp = new Date();
		exp.setTime(exp.getTime() + (expires*60*60*1000));
		expires = exp;
	}
	document.cookie = name + "=" + escape(value) + ((expires == null) ? "" : ("; expires=" + expires.toGMTString()));
}

function DeleteCookie (name) {
	var exp = new Date();
	exp.setTime (exp.getTime() - 1000);
	var cval = GetCookie (name);
	document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();
}