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准备好需要用到的图。图为png的透明图，方便网页中透明。

新建html文档。

书写hmtl代码。

<div class="float-menu">

<div class="plus"><div class="cross"></div></div>

<div class="menu-list">

<a href="#index" class="link-home">首页</a>

<a href="#my" class="link-my">我的</a>

<a href="#cart" class="link-cart">购物<span id="float-cart">6</span></a>

</div>

</div>

书写css代码。

*{margin:0;padding:0;list-style:none;}

.float-menu{width: 50px;height: 50px;position: fixed;z-index: 99999;right: 40px;bottom: 90px;}

.float-menu div{-webkit-transition:all 0.2s linear;-ms-transition:all 0.2s linear;-moz-transition:all 0.2s linear;transition:all 0.2s linear;}

.float-menu .plus{width: 100%;height: 100%;background: url(../images/menu-icon.png) no-repeat center center;background-size: 100%;z-index: 2;position: absolute;left: 0;top: 0;}

.float-menu .plus .cross{width: 100%;height: 100%;position: absolute;left: 0;top: 0;z-index: 3;content: "";background:url(../images/menu-add.png) no-repeat center center;background-size: 37%;}

.float-menu .menu-list{opacity:0;width: 100%;height: 100%;z-index: 1;position: absolute;left: 0;top: 0;border-radius: 100%;}

.float-menu .menu-list a{width: 33%;height: 16%;display: block;position: absolute;text-align: center;padding-top: 17%;opacity: 0;font-size: 0;color: #333;font-size: 12px;text-decoration: none;}

.float-menu .menu-list a.link-home{left: 50%;top: 0;-webkit-transform:translate(-50%,0);-moz-transform:translate(-50%,0);-ms-transform:translate(-50%,0);transform:translate(-50%,0);background: url(../images/icon_home.png) no-repeat center 5px;background-size: 50%;}

.float-menu .menu-list a.link-my{left: 0%;top: 50%;-webkit-transform:translate(0%,-50%);-moz-transform:translate(0%,-50%);-ms-transform:translate(0%,-50%);transform:translate(0%,-50%);background: url(../images/icon_me.png) no-repeat center top;background-size: 50%;}

.float-menu .menu-list a.link-cart{left: 50%;bottom: 0;-webkit-transform:translate(-50%,0);-moz-transform:translate(-50%,0);-ms-transform:translate(-50%,0);transform:translate(-50%,0);background: url(../images/icon_cart.png) no-repeat center top;background-size: 50%;}

.float-menu.open .menu-list a{opacity: 1;font-size: 12px;}

.float-menu.open .cross{-webkit-transform:rotate(135deg);-moz-transform:rotate(135deg);-ms-transform:rotate(135deg);transform:rotate(135deg);border-radius: 100%;}

.float-menu.open .menu-list{opacity: 1;width:300%;height: 300%;left: -100%;top: -100%;background-color: rgba(255,232,78,.7);}

.float-menu #float-cart{background-color: #f97157;border-radius: 100%;display: block;position: absolute;right: 5px;top: 0;color: #fff;min-width: 18px;min-height: 18px;line-height: 18px;text-align: center;}

书写并添加js代码。

初始化css代码。

<style>

* { margin: 0; padding: 0 }

html { overflow-y: scroll }

body, h1, h2, h3, p, div, dl, dt, dd, ul, ol, li, table, th, td, form, button, input, textarea, legend, hr { padding: 0; margin: 0 }

body { padding: 0; margin: 0;  color: #333; font: 12px/18px "微软雅黑", arial; height: 100% }

button, input, select, textarea { font-size: 100% }

textarea { font: 14px/20px "微软雅黑" }

button { border: 0 }

li { list-style: none }

img { border: 0; }

a { color: #06c; text-decoration: none; cursor: pointer; outline: none; hide-focus:expression(this.hideFocus = true);}

a:hover { color: #06c; text-decoration: underline }

.left{ float:left;}

.right{ float:right;}

.clear:after,ul:after{content:"";display:block;visibility:hidden;height:0;clear:both;}

.clear,.area,.con:after{zoom:1}

</style>

代码整体结构。

查看效果。