<title>jQuery UI 特效 - .switchClass() 演示</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">
.toggler { width: 500px; height: 200px; position: relative; }
#button { padding: .5em 1em; text-decoration: none; }
#effect { position: relative; }
.newClass { width: 240px; padding: 1em; letter-spacing: 0; font-size: 1.2em; margin: 0; }
.anotherNewClass { text-indent: 40px; letter-spacing: .4em; width: 410px; height: 100px; padding: 30px; margin: 10px; font-size: 1.6em; }
$( "#button" ).click(function(){
$( ".newClass" ).switchClass( "newClass", "anotherNewClass", 1000 );
$( ".anotherNewClass" ).switchClass( "anotherNewClass", "newClass", 1000 );
<div id="effect" class="newClass ui-corner-all">
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<a href="#" id="button" class="ui-state-default ui-corner-all">运行特效</a>