jquery实现的下拉和收缩代码实例

<!DOCTYPE html>
<html>
<head>
<meta charset=" utf-8">
<meta name="author" content="http://www.softwhy.com/" />
<head>
<title>蚂蚁部落</title>
<style type="text/css">
body{
margin:0 auto;
padding:0;
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(mytest/jQuery/20121225165932118.gif) no-repeat right -50px;
text-align:center;
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>
<script type="text/javascript" src="http://www.softwhy.com/mytest/jQuery/jquery-1.8.3.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$(".btn-slide").click(function(){
    $("#panel").slideToggle("slow");
    $(this).toggleClass("active");
    return false;
})
})
</script>
</head>
<body>
<div style="display: block;" id="panel"></div>
<p class="slide">
<a href="javascript:;" class="btn-slide active">点击查看效果</a>
</p>
</body>
</html>

后来都会美好的！