<!DOCTYPE html>
<html>
<head>
<title>Title of the Document</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js"></script>
</head>
<body>
<input type="checkbox" id="checkbox" checked="checked" />
<div id="mydiv">
<input type="checkbox" id="Uncheckbox" />
</div>
<script>
$("#checkbox").attr("checked") ? alert("Checked") : alert("Unchecked");
$("#Uncheckbox").attr("checked") ? alert("Checked") : alert("Unchecked");
</script>
</body>
</html>