function setCookie(name, value, expires){
	document.cookie = escape(name) + "=" + escape(value) + "; path=/" + ((expires == null) ? "" : "; expires=" + expires.toGMTString());
}

function getCookie(name){
	var cn = name + "=";
	var dc = document.cookie;
	var fm, to;
	
	if (dc.length > 0){
		fm = dc.indexOf(cn);
		if (fm != -1){
			fm += cn.length;
			to = dc.indexOf(";", fm);
			if (to == -1){
				to = dc.length;
			};
			return unescape(dc.substring(fm, to));
		}
	}
	return null;
}

function delCookie(name){
	document.cookie = name + "=; expires=Thu, 01-Jan-70 00:00:00 GMT" + "; path=/";
}