| <style>
a{background:url(http://5key.net/demo/liquid-css-menu/1.gif) left 0; color:#fff; text-decoration:none; height:30px; float:left; cursor:hand; margin:0 5px 0 0;}
#aa a:hover{background:url(http://5key.net/demo/liquid-css-menu/1.gif) left -30px;height:30px;}
#aa a span{background:url(http://5key.net/demo/liquid-css-menu/1.gif) right 0; padding:9px 8px 5px 0; margin:0 0 0 8px; float:left; height:16px;}
#aa a:hover span{background:url(http://5key.net/demo/liquid-css-menu/1.gif) right -30px; color:#000; padding:9px 8px 5px 0; margin:0 0 0 8px; height:16px; }
</style>
<div id="aa">
<h1><strong>CSS自适应宽度圆角按钮</strong></h1>
<a href="#"><span>首页</span></a> <a href="#"><span>不是首页</span></a> <a href="#"><span>他也许是首页</span></a> <a href="#"><span>但他一定不是首页</span></a> <a href="#"><span>好了，就这样把。别扯了~</span></a>
</div> | 
