基于jQuery实现下拉收缩(展开与折叠)特效

<meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <meta charset="utf-8"> <title>jquery下拉收缩特效</title> <style type="text/css"> body { margin: 0 auto; padding: 0; width: 570px; font: 75%/120% arial, helvetica, sans-serif; } a:focus { outline: none; } #panel { background: #69c7f7; height: 200px; display: none; } .slide { margin: 0; padding: 0; border-top: solid 4px #f27613; } .btn-slide { background: #f27613 url(//files.jb51.net/file_images/article/201212/20121225165932118.gif) no-repeat right -50px;; text-align: center; width: 144px; height: 31px; padding: 10px 10px 0 0; margin: 0 auto; display: block; font: bold 120%/100% arial, helvetica, sans-serif; color: #fff; text-decoration: none; } .active { background-position: right 12px; } </style> <h1>演示不了 请刷新下</h1> <div style="display: block;" id="panel"> </div> <p class="slide"></p>