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：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>CSS自適應寬度按鈕</title> <style> *{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(/upload/20071122231110605.gif) left 0; color:#fff; text-decoration:none; height:30px; float:left; cursor:hand; margin:0 5px 0 0;} a:hover{background:url(/upload/20071122231110605.gif) left -30px;height:30px;} a span{background:url(/upload/20071122231110605.gif) right 0; padding:7px 8px 7px 0; margin:0 0 0 8px; float:left; height:16px;} a:hover span{background:url(/upload/20071122231110605.gif) right -30px; color:#000; padding:7px 8px 7px 0; margin:0 0 0 8px; height:16px; } </style> </head> <body> <h1><strong>CSS自適應寬度圓角按鈕</strong></h1> <span>首頁</span> <span>不是首頁</span> <span>他也許是首頁</span> <span>但他一定不是首頁</span> <span>好了，就這樣把。別扯了~</span> </body> </html>
[Ctrl+A 全選 注:如需引入外部Js需重新整理才能執行]
