<html>
<head>
<script type="text/javascript" src='http://code.jquery.com/jquery-1.5.2.js'></script>
<script type="text/javascript">
$(document).ready(function(){
$("div").attr("id","myID" );
console.log($("div").attr("id"));
});
</script>
</head>
<body>
<div>A<span></span></div>
</body>
</html>