基于jQuery代码实现圆形菜单展开收缩效果
jquery圆形菜单展开收缩效果是基于jquery和css3实现的，非常不错，具有参考借鉴价值，需要的的朋友参考下
<head>
<script src="js/jquery.min.js"></script>
<script src="js/jquery.menu.js"></script>
<style>
body {
margin:0 auto;
background:none repeat scroll 0 0 #FCFCFC
}
.outer_container {
height:200px;
position:relative
}
.menu_button {
position:absolute;
bottom:0;
left:0;
border-radius:50%;
height:36px;
width:36px;
border:4px solid #fff;
box-shadow:rgba(0,0,0,.3) 0 3px 8px 0,rgba(0,0,0,.2) 0 0 0 1px,inset rgba(0,0,0,.3) 0 0 0 1px,inset rgba(255,255,255,.3) 0 1px 0 1px;
text-indent:-99999px;
overflow:hidden;
background-color:#e34f3f;
background-image:-moz-linear-gradient(top, #f76f54, #c61f1f);
background-image:-ms-linear-gradient(top, #f76f54, #c61f1f);
background-image:-webkit-gradient(linear,0 0,0 100%,from( #f76f54),to( #c61f1f));
background-image:-webkit-linear-gradient(top, #f76f54, #c61f1f);
background-image:-o-linear-gradient(top, #f76f54, #c61f1f);
background-image:linear-gradient(top, #f76f54, #c61f1f);
background-repeat:repeat-x;
filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#f76f54', endColorstr='#c61f1f', GradientType=0);
z-index:9999;
outline:0
}
.menu_button span {
display:block;
height:36px;
width:36px;
background:url("../images/cross.png") no-repeat center center;
-webkit-transition:.4s ease;
-moz-transition:.4s ease;
-ms-transition:.4s ease;
-o-transition:.4s ease;
transition:.4s ease;
background-size:20px 20px
}
.menu_option {
bottom:18px;
left:5px;
position:absolute
}
.menu_option li {
position:absolute;
display:block;
top:0;
left:0;
-webkit-transition:.3s;
-moz-transition:.3s;
-ms-transition:.3s;
-o-transition:.3s;
transition:.3s
}
.menu_option li a {
position:relative;
display:block;
border-radius:50%;
width:26px;
height:26px;
border:3px solid #fff;
box-shadow:rgba(0,0,0,.4) 0 0 5px 0,rgba(0,0,0,.2) 0 0 0 1px,inset rgba(0,0,0,.5) 0 0 2px 0;
text-indent:-99999px;
overflow:hidden;
background:#444
}
.menu_option li a span {
background-attachment:scroll;
background-clip:border-box;
background-color:transparent;
background-image:url("../images/usr.png");
background-origin:padding-box;
background-position:center center;
background-repeat:no-repeat;
background-size:16px 16px;
display:block;
width:26px;
height:26px;
-webkit-transition:.4s ease;
-moz-transition:.4s ease;
-ms-transition:.4s ease;
-o-transition:.4s ease;
transition:.4s ease
}
.btn-rotate span {
-webkit-transform:rotate(-135deg);
-moz-transform:rotate(-135deg);
-ms-transform:rotate(-135deg);
-o-transform:rotate(-135deg);
transform:rotate(-135deg)
}
</style>
</head>
<body>
<!-- 代码 开始 -->
<div id="outer_container" class="outer_container" >
<a class="menu_button" href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" title="Toggle"><span>Menu Toggle</span></a>
<ul class="menu_option">
<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_blank"><span>Item</span></a></li>
<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_blank"><span>Item</span></a></li>
<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_blank"><span>Item</span></a></li>
<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_blank"><span>Item</span></a></li>
<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_blank"><span>Item</span></a></li>
</ul>
</div>
<!-- 代码 结束 -->
<script>
function PieMenuInit(){
$('#outer_container').PieMenu({
'starting_angel':0, //起始角度
'angel_difference' : 90, //散开角度
'radius':100, //圆形弧度
});
}
$(function() {
PieMenuInit();
});
</script>
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