<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html;
charset=utf-8" />
<title>无标题文档</title>
<style type="text/css">
#main { 500px; font-size:12px; border:1px solid #FFC44C;
}
#box1 { 500px; height:80px; }
.box2 { border-top:#FFC44C solid 1px; 500px; height:80px;
border-bottom:1px #FFC44C solid; }
.boxS { border-top:#FFC44C solid 1px; 500px; height:80px;
border-bottom:1px #FFE6B3 solid;margin-bottom:1px; }
.box3 { border-bottom:#FFE6B3 solid 1px; 500px;
margin-bottom:1px; display:none; }
.boxt { border-bottom:#FFE6B3 solid 1px; 500px;
margin-bottom:1px; display:block; }
#box4 { 500px; height:5px; background:#FFF7E5;
position:relative; }
#box4 span { 80px; border:1px #FFC44C solid;
position:absolute; left:40%; top:5px; background:#FFF7E5;
border-top:none; text-align:center; cursor:pointer; }
</style>
<script type="text/javascript">
window.onload=function(){
var box_2 = document.getElementByIdx_x("box2");
var box_3 = document.getElementByIdx_x("box3");
var box_4 =
document.getElementByIdx_x("box4").getElementsByTagName_r("span")[0];
box_4.onclick=function(){
box_3.className=(box_3.className=="box3")?"boxt":"box3";
box_2.className=(box_2.className=="boxS")?"box2":"boxS";
this.innerHTML=(this.innerHTML=="Show")?"Hidden":"Show";
}
}
</script>
</head>
<body>
<div id="main">
<div
id="box1"></div>
<div id="box2"
class="boxS"></div>
<div id="box3" class="box3">
<ul>
<li>test</li>
<li>test</li>
<li>test</li>
<li>test</li>
<li>test</li>
<li>test</li>
<li>test</li>
<li>test</li>
<li>test</li>
<li>test</li>
</ul>
</div>
<div
id="box4"><span>Show</span></div>
</div>
</body>
</html>