法一：
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<style>
html{height:100%;overflow:hidden;}
body{ background:#f9f9f9;}
#menu{50px;height:50px; position:fixed;right:20px; bottom:20px; }
#menu_list{height:42px;42px; position:relative;margin:4px;}
#menu_list img{ border-radius:21px;position:absolute;left:0;top:0;border-radius:21px;}
#home{50px;height:50px;background:url(img/home.png) no-repeat; border-radius:25px;
position:absolute; left:0;top:0;}
</style>
<script>
window.onload=function(){
var oHome=document.getElementById('home');
var aImg=document.getElementById('menu_list').getElementsByTagName('img');
var bOff=true;
var iR=-150;
oHome.onclick=function(){
if(bOff){
this.style.webkitTransform="rotate(-360deg)";
for(var i=0;i<aImg.length;i++){
var oLt=toLT(iR,90/4*i);
aImg[i].style.transition="0.5s "+i*100+"ms";
aImg[i].style.left=oLt.l+"px";
aImg[i].style.top=oLt.t+"px";
aImg[i].style.webkitTransform="rotate(-720deg)";
}
}else{
this.style.webkitTransform="rotate(0deg)";
for(var i=0;i<aImg.length;i++){
aImg[i].style.transition="0.5s "+(aImg.length-i-1)*100+"ms";
aImg[i].style.left=0+"px";
aImg[i].style.top=0+"px";
aImg[i].style.webkitTransform="rotate(0deg)";
}
}
bOff=!bOff;
}
};
function toLT(iR,iDeg){
// var iLeft=Math.round(Math.sin(iDeg/180*Math.PI)*iR);
// var iTop=Math.round(Math.cos(iDeg/180*Math.PI)*iR);
return{l:Math.round(Math.sin(iDeg/180*Math.PI)*iR),t:Math.round(Math.cos(iDeg/180*Math.PI)*iR)};
}
/*
*/
</script>
</head>
<body>
<div id="menu">
<div id="menu_list">
<img src="img/prev.png" alt=""/>
<img src="img/open.png" alt="" />
<img src="img/clos.png" alt="" />
<img src="img/full.png" alt="" />
<img src="img/refresh.png" alt="" />
</div>
<div id="home"></div>
</div>
</body>
</html>
法二：
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<style>
html{height:100%;overflow:hidden;}
body{ background:#f9f9f9;}
#menu{50px;height:50px; position:fixed;right:20px; bottom:20px; }
#menu_list{height:42px;42px; position:relative;margin:4px;}
#menu_list img{ border-radius:21px;position:absolute;left:0;top:0;border-radius:21px;}
#home{50px;height:50px;background:url(img/home.png) no-repeat; border-radius:25px;
position:absolute; left:0;top:0;}
</style>
<script>
window.onload=function(){
var oHome=document.getElementById('home');
var aImg=document.getElementById('menu_list').getElementsByTagName('img');
var bOff=true;
var iR=-150;
for(var i=0;i<aImg.length;i++){
aImg[i].onclick=function(){
this.style.transition="0.3s ";
this.style.WebkitTransform="scale(2) rotate(-720deg)";
this.style.opacity=0.1;
addEnd(this,end);
};
}
function end(){
this.style.transition="0.1s ";
this.style.WebkitTransform="scale(1) rotate(-720deg)";
this.style.opacity=1;
removeEnd(this,end);
}
oHome.onclick=function(){
if(bOff){
this.style.webkitTransform="scale(1) rotate(-360deg)";
for(var i=0;i<aImg.length;i++){
var oLt=toLT(iR,90/4*i);
aImg[i].style.transition="0.5s "+i*100+"ms";
aImg[i].style.left=oLt.l+"px";
aImg[i].style.top=oLt.t+"px";
aImg[i].style.webkitTransform="scale(1) rotate(-720deg)";
}
}else{
this.style.webkitTransform="scale(1) rotate(0deg)";
for(var i=0;i<aImg.length;i++){
aImg[i].style.transition="0.5s "+(aImg.length-i-1)*100+"ms";
aImg[i].style.left=0+"px";
aImg[i].style.top=0+"px";
aImg[i].style.webkitTransform="scale(1) rotate(0deg)";
}
}
bOff=!bOff;
}
};
function toLT(iR,iDeg){
// var iLeft=Math.round(Math.sin(iDeg/180*Math.PI)*iR);
// var iTop=Math.round(Math.cos(iDeg/180*Math.PI)*iR);
return{l:Math.round(Math.sin(iDeg/180*Math.PI)*iR),t:Math.round(Math.cos(iDeg/180*Math.PI)*iR)};
}
function addEnd(obj,fn)
{
obj.addEventListener('WebkitTransitionEnd',fn,false);
obj.addEventListener('transitionend',fn,false);
}
function removeEnd(obj,fn)
{
obj.removeEventListener('WebkitTransitionEnd',fn,false);
obj.removeEventListener('transitionend',fn,false);
}
/*
*/
</script>
</head>
<body>
<div id="menu">
<div id="menu_list">
<img src="img/prev.png" alt=""/>
<img src="img/open.png" alt="" />
<img src="img/clos.png" alt="" />
<img src="img/full.png" alt="" />
<img src="img/refresh.png" alt="" />
</div>
<div id="home"></div>
</div>
</body>
</html>
