html： 仿制soundmanager2右上角面板

仿制 http://schillmania.com/projects/soundmanager2/#volume 右上角面板

<style type="text/css">
body{background:#999;}
.board-container{position:relative;width:240px;height:500px;font-family:"微软雅黑";}/*总容器*/
.board-bg{position:absolute;width:100%;height:26px;background:#333333;z-index:1;}/*背景*/

.triangle{position:absolute;width:0;height:0;border:8px solid #111;}/*三角*/
.triangle-left{top:26px;left:0;border-left-color:rgba(0,0,0,0);border-bottom-color:rgba(0,0,0,0);}/*左三角*/
.triangle-right{top:26px;right:0;border-right-color:rgba(0,0,0,0);border-bottom-color:rgba(0,0,0,0);}/*右三角*/
.board-title{position:relative;color:#fff;height:26px;line-height:26px;text-align:center;overflow:hidden;z-index:2;}/*标题文字*/
.board-body1{margin:0 16px;padding:6px;background:#fff;z-index:2;}/*内容文字*/
.board-body2{margin:0 16px;padding:6px;background:#fff;border-top:1px dotted #ddd;color:#999;z-index:2;}/*灰色内容文字*/
</style>
</head>
<body>
<div class="board-container">
    <div class="board-bg"></div>
    <div class="triangle triangle-left"></div>
    <div class="triangle triangle-right"></div>
    <div class="board-title">啊啊啊啊啊啊啊啊啊啊
    </div>
    <div class="board-body1">啊啊啊啊啊啊啊啊啊啊啊啊啊
    </div>
    <div class="board-body2">啊啊啊啊啊啊啊啊啊啊啊啊啊
    </div>
</div>