html div层的展开与收缩的特效源代码，下面小编带你们了解一下
<html>
<head>
<title>p展开收缩代码-www.zuidaima.com-最代码</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, #class2content,#class3content { height:50px;overflow:hidden;display:none;}
</style>
<script>
function $(element){
return element = document.getelementbyid(element);
}
function $d(element){
var d=$(element);
var h=d.offsetheight;
var maxh=300;
function dmove(){
if(h>=maxh){
d.style.height='300px';
clearinterval(iintervalid);
}else{
h+=50; //设置层展开的速度
d.style.display='block';
d.style.height=h+'px';
}
}
iintervalid=setinterval(dmove,2);
}
function $d2(element){
var d=$(element);
var h=d.offsetheight;
var maxh=300;
function dmove(){
if(h<=0){
d.style.display='none';
clearinterval(iintervalid);
}else{
h-=50;//设置层收缩的速度
d.style.height=h+'px';
}
}
iintervalid=setinterval(dmove,2);
}
function $use(targetid,objn){
var d=$(targetid);
var sb=$(objn);
if (d.style.display=="block"){
$d2(targetid);
d.style.display="none";
sb.innerhtml="展开";
} else {
var p=document.getelementsbytagname("p");
var span=document.getelementsbytagname("span");
for(var i=0,l=p.length;i<l;i++){
if(p[i]!=d){
p[i].style.height=0;
p[i].style.display="none";
span[i].innerhtml="展开";
}
}
$d(targetid);
d.style.display="block";
sb.innerhtml='收缩';
}
}
</script>
</head>
<body>
<p class="class1">
<h1>p展开收缩效果</h1>
<span id="statebut" onclick="$use('class1content','statebut')">展开</span>
<p id="class1content">something.........</p>
</p>
<p class="class1">
<h1>p展开收缩效果</h1>
<span id="statebut1" onclick="$use('class2content','statebut1')">展开</span>
<p id="class2content">something.........</p>
</p>
<p class="class1">
<h1>p展开收缩效果</h1>
<span id="statebut2" onclick="$use('class3content','statebut2')">展开</span>
<p id="class3content">wojiade</p>
</p>
</body>
</html>
以上就是分享一个html div层的展开与收缩的特效源代码的详细内容。