<!DOCTYPE html> 
<html> 
<head> 
<meta charset=" utf-8"> 
<meta name="author" content="http://www.softwhy.com/" /> 
<head> 
<title>螞蟻部落</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(mytest/jQuery/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> 
<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:;" rel="external nofollow" class="btn-slide active">點(diǎn)擊查看效果</a> 
</p> 
</body> 
</html>

以上代碼實(shí)現(xiàn)了下拉和收縮效果，代碼比較簡單，這里就不多介紹了。

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