在线实例
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<div
class
=
"main"
>
<div
class
=
"mianc"
>
<h1>默认</h1>
<!-- Demo start -->
<div
class
=
"select"
>
<select
class
=
"myselect"
>
<option value=
"交互设计"
>交互设计</option>
<option value=
"视觉设计"
>视觉设计</option>
<optgroup label=
"开发"
>
<option value=
"前端开发"
>前端开发</option>
<option value=
"后端开发"
>后端开发</option>
</optgroup>
<option value=
"用户研究"
>用户研究</option>
<option value=
"产品经理"
>产品经理</option>
</select>
</div>
<!-- Demo end -->
</div>
</div>
<style>
* { margin: 0; padding: 0;}
html, body { height: 100%; overflow: hidden;}
body { font-family: Consolas,arial,
"宋体"
;}
.menu { position: absolute; left: 0; top: 0; width: 200px; height: 100%;
转载：http://www.cnblogs.com/niuboren/p/6108170.html
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