css实现缩进无限嵌套

使用css实现缩进带背景无限嵌套，支持Ie6，代码如下：

<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<style>
*{margin:0;padding:0;}
li{list-style:none;}
.box{width:300px;height:400px;border:2px solid #ccc;margin:10px;position:relative;}
.box li{padding-left:15px;line-height:20px;}
.box a{display:block;}
.box .bg{position:absolute;z-index:-1;left:0;width:300px;height:20px;background:#ccc;opacity:0;filter:alpha(opacity=0);}
.box a:hover .bg{opacity:1;filter:alpha(opacity=100);}
	</style>
</head>
<body>
	<div class="box">
		<ul>
			<li>
				<a href="#"><span class="bg"></span>12</a>
				<ul>
					<li>
						<a href="#"><span class="bg"></span>12</a>
						<ul>
							<li>
								<a href="#"><span class="bg"></span>12</a>
								<ul>
									<li><a href="#"><span class="bg"></span>12</a></li>
									<li><a href="#"><span class="bg"></span>12</a></li>
								</ul>
							</li>
							<li><a href="#"><span class="bg"></span>12</a></li>
						</ul>
					</li>
				</ul>
			</li>
		</ul>
	</div>
</body>
</html>

　　

posted @ 2015-03-10 14:31  破男孩  阅读(1172)  评论(0)  编辑  收藏  举报