我正在尝试使用纯 css 构建一个垂直弹出菜单。像这个:
http://devinrolsen.com/wp-content/uploads/2009/09/fig4.gif
一切都在 FF、Opera、Chrome 中完美运行,但在 Internet Explorer 9 中却不行,在浏览菜单项时子级别不显示。诀窍在哪里?
这是完整的代码:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<style type="text/css">
#navigation{font-size: 20px; width: 150px}
#navigation ul{margin: 0px;padding: 0px;}
#navigation li{list-style: none;}
ul.top-level{background: #686868}
ul.top-level.li{
border-style: solid;
border-width: 2px;}
#navigation a{
color: #ffffff;
display: block;
height: 25px;
line-height: 25px;
text-indent: 10px;
text-decoration: none;
width: 100%
}
#navigation a:hover {text-decoration: underline; background-color: #000000; position: relative;}
#navigation li:hover {position: relative;}
ul.sub-level {display: none}
li:hover .sub-level{
background: #000000;
display: block;
width: 150px;
position: absolute;
left: 75px;
top: 5px;
}
</style>
</head>
<body>
<div id="navigation">
<ul class="top-level">
<li><a href="#">Home</a>
<ul class="sub-level">
<li><a href="#">Sub Menu Item 1</a></li>
<li><a href="#">Sub Menu Item 2</a></li>
<li><a href="#">Sub Menu Item 3</a></li>
<li><a href="#">Sub Menu Item 4</a></li>
<li><a href="#">Sub Menu Item 5</a></li>
</ul>
</li>
</ul>
</div>
</body>
</html>