<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">  
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<title>很酷的DIV層的展開(kāi)收縮效果</title>
<style>
* { margin:0; padding:0;}
body {
text-align:center;
font:75% Verdana, Arial, Helvetica, sans-serif;
}
h1 {
font:125% Arial, Helvetica, sans-serif;
text-align:left; font-weight:bolder;
background:#333; padding:3px;
display:block; color:#99CC00
}
.class1 {
width:40%; background:#CCC;
position:relative; margin:0 auto;
padding:5px;}
span { position:absolute; right:10px;
top:8px; cursor:pointer; color:yellow;
}
p { text-align:left; line-height:20px;
background:#333; padding:3px; margin-top:5px;
color:#99CC00
}
#class1content {
height:300px;overflow:hidden
}
</style>
<script>
function $(element){
return element = document.getElementById(element);
}
function $D(){
var d=$('class1content');
var h=d.offsetHeight;
var maxh=300;
function dmove(){
h+=50; //設(shè)置層展開(kāi)的速度
if(h>=maxh){
d.style.height='300px';
clearInterval(iIntervalId);
}else{
d.style.display='block';
d.style.height=h+'px';
}
}
iIntervalId=setInterval(dmove,2);
}
function $D2(){
var d=$('class1content');
var h=d.offsetHeight;
var maxh=300;
function dmove(){
h-=50;//設(shè)置層收縮的速度
if(h<=0){
d.style.display='none';
clearInterval(iIntervalId);
}else{
d.style.height=h+'px';
}
}
iIntervalId=setInterval(dmove,2);
}
function $use(){
var d=$('class1content');
var sb=$('stateBut');
if(d.style.display=='none'){
$D();
sb.innerHTML='收縮';
}else{
$D2();
sb.innerHTML='展開(kāi)';
}
}
</script>
</head>
<body>
<div class="class1">
<h1>DIV層的展開(kāi)隱藏效果</h1>
<span id="stateBut" onclick="$use()">展開(kāi)</span>
<p id="class1content">曾經(jīng)有一份真誠(chéng)的愛(ài)情放在我面前， 
<br>我沒(méi)有珍惜，<br>等我失去的時(shí)候我才后悔莫及，
<br>人世間最痛苦的事莫過(guò)于此。
<br>如果上天能夠給我一個(gè)再來(lái)一次的機(jī)會(huì)，
<br>我會(huì)對(duì)那個(gè)女孩子說(shuō)三個(gè)字：<br>我愛(ài)你。
<br>如果非要在這份愛(ài)上加上一個(gè)期限，
<br>我希望是……一萬(wàn)年！”
</div>
</body>
</html>

希望本文所述對(duì)大家的javascript程序設(shè)計(jì)有所幫助。

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