IE6居然不支持以下划线开始的类名...如下代码:
![](https://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
Code
<!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>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<style>
*{margin:0;padding:0;}
._wo{color:red;}
._wo:hover{color:#000;}
</style>
</head>
<body>
<div>
<a href="#" class="_wo">我是测试IE6的类名是否支持——</a>
</div>
</body>
</html>