先來看張圖片：
原理就是通過背景的靠左對齊和靠右對齊用A標籤和span標籤組合出一個完整的圓角矩形。再通過hover標籤去滑動圖片。而你只需要一張圖片：
ok，看看代碼吧。
CSS: 複製代碼 代碼如下:*{margin:0; padding:0;}
body{padding:10px; font-size:12px;}
h1{margin:0; padding:10px 0; font-size:14px; font-weight:bold;}
a{background:url(1.gif) left 0; color:#fff; text-decoration:none; height:30px; float:left; cursor:hand; margin:0 5px 0 0;}
a:hover{background:url(1.gif) left -30px;height:30px;}
a span{background:url(1.gif) right 0; padding:7px 8px 7px 0; margin:0 0 0 8px; float:left; height:16px;}
a:hover span{background:url(1.gif) right -30px; color:#000; padding:7px 8px 7px 0; margin:0 0 0 8px; height:16px; }
HTML: 複製代碼 代碼如下:<body>
<h1><strong>CSS自適應寬度圓角按鈕 @5key.net</strong></h1>
<a href="#"><span>首頁</span></a>
<a href="#"><span>不是首頁</span></a>
<a href="#"><span>他也許是首頁</span></a>
<a href="#"><span>但他一定不是首頁</span></a>
<a href="#"><span>好了，就這樣把。別扯了~</span></a>
</body>
示範： xmlns="http://www.w3.org/1999/xhtml">
CSS自適應寬度圓角按鈕
首頁
不是首頁
他也許是首頁
但他一定不是首頁
好了，就這樣把。別扯了~
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