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<!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=utf-8" />
<title>css的箭头代码</title>
<style>
div{margin:20px 0;}
.arrow_up{width:0; height:0; border-left:15px solid transparent; border-right:15px solid transparent; border-bottom:15px solid #2f2f2f; font-size:0; line-height:0;}
.arrow_down{width:0; height:0; border-left:20px solid transparent; border-right:20px solid transparent; border-top:20px solid #f00; font-size:0; line-height:0;}
.arrow_left{width:0; height:0; border-bottom:15px solid transparent; border-top:15px solid transparent; border-left:10px solid #0f0; font-size:0; line-height:0;}
.arrow_right{width:0; height:0; border-top:15px solid transparent; border-bottom:15px solid transparent; border-right:60px solid #f0f; font-size:0; line-height:0;}
</style>
</head>
<body>
<div class="arrow_up"></div>
<div class="arrow_down"></div>
<div class="arrow_left"></div>
<div class="arrow_right"></div>
</body>
</html>
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原文地址：http://www.cnblogs.com/will-2008/p/4881839.html
