<html lang="en">
<head>
<meta charset="utf-8">
<title>可放置小部件（Droppable Widget）演示</title>
<link rel="stylesheet" href="https://libs.baidu.com/jqueryui/1.10.4/css/jquery-ui.min.css">
<style>
#draggable {
width: 100px;
height: 100px;
background: #ccc;
}
#droppable {
position: absolute;
left: 250px;
top: 0;
width: 125px;
height: 125px;
background: #999;
color: #fff;
padding: 10px;
}
</style>
<script src="https://libs.baidu.com/jquery/1.10.2/jquery.min.js"></script>
<script src="https://libs.baidu.com/jqueryui/1.10.4/jquery-ui.min.js"></script>
</head>
<body>
<div id="droppable">请放置到这里！</div>
<div id="draggable">请拖拽我！</div>
<script>
$( "#draggable" ).draggable();
$( "#droppable" ).droppable({
drop: function() {
alert( "dropped" );
}
});
</script>
</body>
</html>