div慢慢展开与折叠

<mce: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:#555;  padding:3px; display:block; color:#99CC00}
.class1 { width:40%; background:#CCCCCC; 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:#555; padding:3px; margin-top:5px; color:#99CC00}
#class1content { height:256px;overflow:hidden}
–></mce:style><style  mce_bogus=”1″><!–
* { 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:#555;  padding:3px; display:block; color:#99CC00}
.class1 { width:40%; background:#CCCCCC; 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:#555; padding:3px; margin-top:5px; color:#99CC00}
#class1content { height:256px;overflow:hidden}
–></style>
<mce:script type=”text/javascript”><!–
function $(element){
return element = document.getElementById(element);
}
function $D(){
var d=$(‘class1content’);
var h=d.offsetHeight;
var maxh=300;
function dmove(){
h+=10; //层展开速度
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-=10;//层收缩速度
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=’展开’;
}else{
$D2();
sb.innerHTML=’收缩’;
}
}
// –></mce:script>
<div class=”class1″>
<h1>展开/折叠效果</h1>
<span id=”stateBut” onClick=”$use()”>展开</span>
<p id=”class1content”>jquery SimpleModal Ajax弹出对话框插件，拥有简洁风格的网页弹出层插件，风格设计比较简约大方，可弹出图片、弹出含有HTML代码的div对话框等，类似的效果已有很多，请根据自己的需要采用吧。。</p>
</div>