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CSS样式表 中的 网页制作实例:em实现倒三角的提示效果
出处:互联网 整理: 软晨网（RuanChen.com） 发布: 2009-09-28 浏览: 171 ::
收藏到网摘: n/a
效果如下：
鼠标放上显示第二个的效果！
代码如下：
<!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>em实现倒三角的提示效果-JS特效学院</title>
</head>
<style>
<!--
#menu {width:500px;padding:0;margin:40px auto;list-style-type:none;display:<span href="tag.php?name=tab" onclick="tagshow(event)" class="t_tag">tab</span>le;}
#menu li {width:100px; float:left; line-height:30px}
#menu a {position:relative;display:block; text-decoration:none; background:#cccccc;width:100px; }
#menu a span {display:block; font-weight:bold;color:#000; border-style:solid;border-width:0px 2px 2px 0px; border-color:#fff #fff #06a #fff;text-align:center; }#menu a em {display:none;}
#menu a:hover {background:#FF0000;}#menu a:hover span {color:#fff; }
#menu a:hover em {display:block; overflow:hidden; border:6px solid #06a; border-color:#06a #fff; border-width:6px 6px 0 6px; position:absolute; left:50%; top:100%;margin-left:-6px;}
-->
</style>
<body>
<ul id="menu">
<li><a href="http://www.ruanchen.com/"codeTextarea"><!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>em实现倒三角的提示效果-JS特效学院</title> </head> <style> <!-- #menu {width:500px;padding:0;margin:40px auto;list-style-type:none;display:<span href="tag.php?name=tab" onclick="tagshow(event)" class="t_tag">tab</span>le;} #menu li {width:100px; float:left; line-height:30px} #menu a {position:relative;display:block; text-decoration:none; background:#cccccc;width:100px; } #menu a span {display:block; font-weight:bold;color:#000; border-style:solid;border-width:0px 2px 2px 0px; border-color:#fff #fff #06a #fff;text-align:center; }#menu a em {display:none;} #menu a:hover {background:#FF0000;}#menu a:hover span {color:#fff; } #menu a:hover em {display:block; overflow:hidden; border:6px solid #06a; border-color:#06a #fff; border-width:6px 6px 0 6px; position:absolute; left:50%; top:100%;margin-left:-6px;} --> </style> <body> <ul id="menu"> <li><a href="http://www.ruanchen.com/"runCode(this.offsetParent.getElementsByTagName('textarea')[0])" type="button" value="运行代码" /> [Ctrl+A 全部选择 提示：你可先修改部分代码，再按运行]
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>em实现倒三角的提示效果-JS特效学院</title>
</head>
<style>
<!--
#menu {width:500px;padding:0;margin:40px auto;list-style-type:none;display:<span href="tag.php?name=tab" onclick="tagshow(event)" class="t_tag">tab</span>le;}
#menu li {width:100px; float:left; line-height:30px}
#menu a {position:relative;display:block; text-decoration:none; background:#cccccc;width:100px; }
#menu a span {display:block; font-weight:bold;color:#000; border-style:solid;border-width:0px 2px 2px 0px; border-color:#fff #fff #06a #fff;text-align:center; }#menu a em {display:none;}
#menu a:hover {background:#FF0000;}#menu a:hover span {color:#fff; }
#menu a:hover em {display:block; overflow:hidden; border:6px solid #06a; border-color:#06a #fff; border-width:6px 6px 0 6px; position:absolute; left:50%; top:100%;margin-left:-6px;}
-->
</style>
<body>
<ul id="menu">
<li><a href="http://www.ruanchen.com/"codeTextarea"><!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>em实现倒三角的提示效果-JS特效学院</title> </head> <style> <!-- #menu {width:500px;padding:0;margin:40px auto;list-style-type:none;display:<span href="tag.php?name=tab" onclick="tagshow(event)" class="t_tag">tab</span>le;} #menu li {width:100px; float:left; line-height:30px} #menu a {position:relative;display:block; text-decoration:none; background:#cccccc;width:100px; } #menu a span {display:block; font-weight:bold;color:#000; border-style:solid;border-width:0px 2px 2px 0px; border-color:#fff #fff #06a #fff;text-align:center; }#menu a em {display:none;} #menu a:hover {background:#FF0000;}#menu a:hover span {color:#fff; } #menu a:hover em {display:block; overflow:hidden; border:6px solid #06a; border-color:#06a #fff; border-width:6px 6px 0 6px; position:absolute; left:50%; top:100%;margin-left:-6px;} --> </style> <body> <ul id="menu"> <li><a href="http://www.ruanchen.com/"runCode(this.offsetParent.getElementsByTagName('textarea')[0])" type="button" value="运行代码" /> [Ctrl+A 全部选择 提示：你可先修改部分代码，再按运行]
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