WHy doesn't this work?
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<style type="text/css">
#content {
background:#CCCCCC;
width:500px;
height:500px;
}
#drop {
height:200px;
width:200px;
background:#00FFFF;
float:right;
}
#drag {
background:#009966;
width:100px;
height:100px;
float:left;
}
.active {
background:#FFCC33;
}
</style>
<script type="text/ecmascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.
js"></script>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.7.2/jquery-ui.min.
js"></script>
<script type="text/javascript">
$(document).ready(function() {
$('#drag').draggable({
containment: '#content',
scrollSensitivity: 60,
revert: true,
cursor: 'move'
});
$('#drop').droppable({
accept: '#drag',
drop: function(event, ui) {
$(this).addClass('.active');
}
});
});
</script>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
</head>
<body>
<div id="content">
<div id="drag">
</div>
<div id="drop">
</div>
</div>
</body>
</html>
