<!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/1.5/jquery.min.js"></script>
<script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/jquery-ui.min.js"></script>
<style type="text/css">
body{
margin: 0;
padding: 0;
}
#draggable {
width: 100%;
height: 400px;
background: lightgray;
border-bottom: 6px silver solid;
margin-top: -400px;
}
</style>
<script>
$(document).ready(function() {
var drag = $("#draggable");
drag.draggable({ axis: "y" });
drag.mouseup(function(){
var position = drag.position();
if(position.top < 120){
drag.animate({
marginTop: "-400px"
});
} else {
drag.animate({
marginTop: "0px",
top: "0px"
});
}
});
});
</script>
</head>
<body>
<div id="draggable"></div>
</body>
</html>