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div提示框尖角.html

<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			.simple-tip-box {
				position: relative;
				margin-top: 100px;
				width: 100px;
				border: 1px solid #cccccc;
				background: transparent;
			}

			.simple-tip-box a {
				display: block;
				text-align: center;
			}

			.up,
			down {
				position: absolute;
				left: 20px;
				width: 0px;
				height: 0px;
			}

			.up {
				top: -19px;
				border-bottom: 10px solid black;
				border-left: 10px solid transparent;
				border-right: 10px solid transparent;
				border-top: 10px solid transparent;
			}

			.down {
				top: -18px;
				border-bottom: 10px solid #fff;
				;
				border-left: 10px solid transparent;
				border-right: 10px solid transparent;
				border-top: 10px solid transparent;
			}
		</style>
	</head>
	<body>
		<div class="simple-tip-box">
			<div class="up"></div>
			<div class="down"></div>
			<a>我的任务</a>
			<a>我的百科</a>
			<a>我的词条</a>
			<a>账号设置</a>
			<a>退出</a>
			<div class="clearfix"></div>
	</body>
</html>