<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>jQuery UI Sortable - Drop placeholder</title>
<link rel="stylesheet" href="https://code.jquery.com/ui/1.11.4/themes/smoothness/jquery-ui.css">
<script src="https://code.jquery.com/jquery-1.10.2.js"></script>
<script src="https://code.jquery.com/ui/1.11.4/jquery-ui.js"></script>
<link rel="stylesheet" href="/resources/demos/style.css">
<style>
#sortable { list-style-type: none; margin: 0; padding: 0; 60%; }
#sortable li { margin: 0 5px 5px 5px; padding: 5px; font-size: 1.2em; height: 1.5em; }
html>body #sortable li { height: 1.5em; line-height: 1.2em; }
.ui-state-highlight { height: 1.5em; line-height: 1.2em; }
</style>
<script>
$(function() {
$( "#sortable" ).sortable({
placeholder: "ui-state-highlight"
});
$( "#sortable" ).disableSelection();
});
</script>
</head>
<body>
<ul id="sortable">
<li class="ui-state-default">Item 1</li>
<li class="ui-state-default">Item 2</li>
<li class="ui-state-default">Item 3</li>
<li class="ui-state-default">Item 4</li>
<li class="ui-state-default">Item 5</li>
<li class="ui-state-default">Item 6</li>
<li class="ui-state-default">Item 7</li>
</ul>
</body>
</html>
详细参考网址:http://jqueryui.com/