<title>jQuery UI 按钮(Button) - 复选框</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">
$( "#format" ).buttonset();
#format { margin-top: 2em; }
<input type="checkbox" id="check"><label for="check">切换</label>
<input type="checkbox" id="check1"><label for="check1">B</label>
<input type="checkbox" id="check2"><label for="check2">I</label>
<input type="checkbox" id="check3"><label for="check3">U</label>