本貼代碼實現的是鼠標移動至按鈕時變色，及邊框交點處的1個像素缺口（視覺上營造一種轉角效果）
僅供新手參考學習，歡迎大家提出更多的實現方法。
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<title>google analytics buttons</title>
<style type="text/css"> /* default stuff */
body { padding:20px; font-family:arial; text-align:center; } p, li { font-size: 12px; line-height:18px; } h3 { margin-bottom:6px; }
.examplesGoHere { text-align:left; margin:0 auto; }
.letsGiveItAFixedWidthOf200Pixels { width:200px; } ul { list-style:none; margin-left:0; padding-left:0; margin-top:0; } ul li { margin-bottom:8px; margin-left:0; padding-left:0; }
/*---- notched effect for links in the unordered list ------*/
.notchedListItems a { display:block; border: solid #666; border-width: 0 1px; text-decoration: none; outline:none; color: #000; background: #e4e4e4; }
.notchedListItems a b { display: block; position:relative; top: -1px; left: 0; border:solid #666; border-width:1px 0 0; font-weight:normal; } .notchedListItems a b b { border-width:0 0 1px; top: 2px; padding:1px 6px; }
.notchedListItems a:hover, .notchedListItems a:hover b { background:#666; color:white; }
.feature { border:solid #647aae; border-width:0 1px; background:#b0c0e6; }
.feature div { position:relative; top: -1px; left: 0; border:solid #647aae; border-width:1px 0 0; } .feature div div { top: 2px; border-width:0 0 1px; padding: 0px 6px; }
</style>
</head>
<body>
<div class="examplesGoHere letsGiveItAFixedWidthOf200Pixels">
<h3>A list</h3>
<ul class="notchedListItems">
<li><a href="#"><b><b>About</b></b></a></li>
<li><a href="#"><b><b>Contact</b></b></a></li>
<li><a href="#"><b><b>Cssrain</b></b></a></li>
</ul>
<h3>A div</h3>
<div class="feature">
<div>
<div>
<p>This is an example of the notched corners as applied to a div container.</p>
<p>This is an example of the notched corners as applied to a div container.</p>
<p>This is an example of the notched corners as applied to a div container.</p>
</div>
</div>
</div>
<ul class="notchedListItems">
<li>
<a href="#"><b><b>CSS設計</b></b></a>
</li>
</ul>
</div>
<!-- end .examplesGoHere -->
</body>
</html>
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