复制代码 代码如下:
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<style type = "text/css">
.hrtest{
height:20px;
width:50px;
border-top:1px solid red;
border-left:none;
border-right:none;
border-bottom:none;
}
</style>
</head>
<body>
<hr class = "hrtest">
</body>
</html>
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