javascript+css3 实现动态按钮菜单特效

<div class="bar" id="menubar">
<div class="menu" id="menu0">
</div>
<div class="menu" id="menu1">
</div>
<div class="menu" id="menu2">
</div>
</div>
.bar{
width:px;
height:px;
border:px solid #ccc;
border-radius:%;
position:fixed;
top:px;
right:px;
z-index:;
cursor:pointer;
}
.menu{
width:px;
height:px;
background-color:#ccc;
position:absolute;
transform:translated(-%,-%,);
left:%;
transition:all .s cubic-bezier(., ., ., .) s
}
#menu{
top:%;
}
#menu{
top:%;
}
#menu{
top:%;
}
window.onload = function () {
var menubar = document.getElementById("menubar");
var menu = document.getElementById("menu");
var menu = document.getElementById("menu");
var menu = document.getElementById("menu");
var i = ;
menubar.onclick = function () {
i++;
if (i % == ) {
menu.style.top = + "%";
menu.style.display = "none";
menu.style.top = + "%";
menu.style.transform = "translated(-%,-%,) rotate(deg)";
menu.style.transform = "translated(-%,-%,) rotate(deg)";
}
else {
menu.style.transform = "translated(-%,-%,) rotate(deg)";
menu.style.transform = "translated(-%,-%,) rotate(deg)";
menu.style.top = + "%";
menu.style.top = + "%";
menu.style.display = "block";
}
}
}