<title>jQuery UI 拖动(Draggable) - 还原位置</title>
<link rel="stylesheet" href="//apps.bdimg.com/libs/jqueryui/1.10.4/css/jquery-ui.min.css">
<script src="//apps.bdimg.com/libs/jquery/1.10.2/jquery.min.js"></script>
<script src="//apps.bdimg.com/libs/jqueryui/1.10.4/jquery-ui.min.js"></script>
<link rel="stylesheet" href="jqueryui/style.css">
#draggable, #draggable2 { width: 100px; height: 100px; padding: 0.5em; float: left; margin: 0 10px 10px 0; }
$( "#draggable" ).draggable({ revert: true });
$( "#draggable2" ).draggable({ revert: true, helper: "clone" });
<div id="draggable" class="ui-widget-content">
<div id="draggable2" class="ui-widget-content">