function ReadCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for (var i = 0; i < ca.length; i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring (1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

var dtalk_account_id_hash = ReadCookie ("account_id_hash");
if (dtalk_account_id_hash)
	dtalk_local_visitor_id = unescape (dtalk_account_id_hash);