让用户鼠标点击按钮后图层旋转显示特效，可以自由向左向右选择旋转，立体感很强，可用作商品旋转展示特效。
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html;charset=gb2312">
<meta name="keywords" content="武鸣人网站,武鸣信息网,武鸣本地网,武鸣信息资源平台,减肥,健身,励志,励志语录,js特效,网页特效,www.wuming.ren">
<meta name="description" content="欢迎来到武鸣人信息资源平台，各种信息免费发布，资源共享合作共赢，分享互联网流行的励志语录经典短句，减肥健身健康小常识及打卡记录，收集各种js特效代码。">
<title>按钮控制图层旋转js特效_武鸣人</title>
<style type="text/css">
#www_wuming_ren{position:relative;margin:20px auto;width:800px;border:1px solid #999999;}
.wuming_ren{position:absolute;height:40px;width:60px;background:#999999;border:1px solid #eeeeee;cursor:pointer;}
</style>
<script language="javascript">
var len;
var showerObj;
var listObj;
var showerWidth=800;
var showerHeight=400;
var r;
var cR=0;
var ccR=0;
var timer=0;
window.onload=function(){
showerObj=document.getElementById("www_wuming_ren");
listObj=showerObj.getElementsByTagName("div");
len=listObj.length;
r=Math.PI/180*360/len;
for(var i=0;i<len;i++){
var wuming_ren=listObj[i];
wuming_ren.style.top=showerHeight/2+Math.sin(r*i)*showerWidth/2-20+"px";
wuming_ren.style.left=showerWidth/2+Math.cos(r*i)*showerWidth/2-30+"px";
wuming_ren.rotate=(r*i+2*Math.PI)%(2*Math.PI);
wuming_ren.onclick=function(){
cR=Math.PI/2-this.rotate;
timer || (timer=setInterval(rotate,10));
}
}
var rX=showerObj.offsetLeft+showerWidth/2;
var ry=showerObj.offsetTop+showerHeight/2;
var rotate=function(){
ccR=(ccR+2*Math.PI)%(2*Math.PI);
if(cR-ccR<0) cR=cR+2*Math.PI;
if(cR-ccR<Math.PI){
ccR=ccR+(cR-ccR)/19;
}else{
ccR=ccR-(2*Math.PI+ccR-cR)/19;
}
if(Math.abs((cR+2*Math.PI)%(2*Math.PI)-(ccR+2*Math.PI)%(2*Math.PI))<Math.PI/720){
ccR=cR;
clearInterval(timer);
timer=0;
}
for(var i=0;i<len;i++){
var wuming_ren=listObj[i];
var w,h;
var sinR=Math.sin(r*i+ccR);
var cosR=Math.cos(r*i+ccR);
w=60+0.6*60*sinR;
h=(40+0.6*40*sinR);
wuming_ren.style.cssText +=";width:"+w+"px;height:"+h+"px;top:"+parseInt(showerHeight/2+sinR*showerWidth/2/3-w/2)+"px;left:"+parseInt(showerWidth/2+cosR*showerWidth/2-h/2)+"px;z-index:"+parseInt(showerHeight/2+sinR*showerWidth/2/3-w/2)+";";
}
}
document.getElementById("l").onclick=function(){
cR=(cR+r+2*Math.PI)%(2*Math.PI);
timer || (timer=setInterval(rotate,10));
}
document.getElementById("r").onclick=function(){
cR=(cR-r+2*Math.PI)%(2*Math.PI);
timer || (timer=setInterval(rotate,10));
}
rotate();
}//武鸣人网站https://www.wuming.ren 网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)
</script>
</head>
<body>
<a href="https://www.wuming.ren">武鸣人</a>，各种信息资源免费发布，分享励志语录经典短句，减肥健身常识，各种js特效代码。网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)<hr>
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<script type="text/javascript" src="https://www.wuming.ren/ad/tc.js"></script>
<script type="text/javascript" src="https://www.wuming.ren/ad/a.js"></script>
<input id="l" type="button" value="left">
<input id="r" type="button" value="right">
<div id="www_wuming_ren">
<div class="wuming_ren">武鸣人一号</div>
<div class="wuming_ren">武鸣人二号</div>
<div class="wuming_ren">武鸣人三号</div>
<div class="wuming_ren">武鸣人四号</div>
<div class="wuming_ren">武鸣人五号</div>
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<div class="wuming_ren">武鸣人八号</div>
<div class="wuming_ren">武鸣人九号</div>
<div class="wuming_ren">武鸣人十号</div>
<div class="wuming_ren">武鸣人十一号</div>
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<div class="wuming_ren">武鸣人十四号</div>
<div class="wuming_ren">武鸣人十五号</div>
</div>
</body>
</html>