this is my code :
<!DOCTYPE html>
<html>
<head>
<link href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/themes/base/jquery-ui.css" rel="stylesheet" type="text/css"/>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js"></script>
<script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/jquery-ui.min.js"></script>
<style type="text/css">
#resizable { width: 100px; height: 100px; background: silver; }
</style>
<script>
$(document).ready(function() {
$("#resizable").resizable();
});
</script>
</head>
<body style="font-size:62.5%;">
<div id="resizable">test</div>
</body>
</html>
thanks