请给我解释下下面这段代码的含义么？谢谢了

和上面一样啊
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head><BODY>
<script language="javascript">
AppLoc = {
loading: "Loading ...",
Weather_days: {
Monday:"MondayValue",
Tuesday:"Tuesday",
Wednesday:"Wednesday",
Thursday:"Thursday",
Friday:"Friday",
Saturday:"Saturday",
Sunday:"Sunday"
}
}
window.alert(AppLoc["loading"]);
window.alert(AppLoc["Weather_days"]["Monday"]);
</script>
</BODY>
</html>