function readCookie(name) {
	allcookie = document.cookie + ';'
	start1 = allcookie.indexOf(name);
	if(start1 != -1) {
		target = allcookie.substring(start1, allcookie.length);
		start2 = target.indexOf('=', 0) + 1;
		end = target.indexOf(';', start2);
		return(unescape(target.substring(start2, end)));
	}
	return("");
}

function writeCookie(name, values) {
	expdays = 32;
	t = new Date;
	t.setTime(t.getTime() + expdays * 24 * 60 * 60 * 1000);
	document.cookie = name + '=' + escape(values) + '; expires =' + t.toGMTString();
}

function clearCookie(name) {
	if(document.cookie != " "); {
		t = new Date;
		t.setTime(t.getTime() - 1 * 24 * 60 * 60 * 1000);
		document.cookie = name + '= ; expires =' + t.toGMTString();
	}
}