css border画三角形 - 码农教程

编辑代码
<!doctype html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>读取本地文件</title>
	
	<style type="text/css">
		body{
	margin:0;
}

#container{
	width:1000px;
	margin:50px auto;
}
#controller{
	width:400px;
	height: auto;
	float: left;
	border: 2px solid #D4D4D4;
	padding:10px;
}
dl{
	height: 60px;
}
dt{
	margin-bottom: 10px;
	font-weight: bold;
	display: inline-block;
	float: left;
	margin-right: 10px;
}
dd{
	float: left;
	padding-left: 0;
	margin-left:10px;
	position: relative;
	top:-12px;
}

.radios{
	display:inline-block;
	padding:5px 8px;
	background:#FFF;
	border:2px solid #D4D4D4;
	cursor:pointer;
	margin-right: 5px;
	margin-top:5px;
	min-width:70px;
	text-align:center;
}

.radios.current,.radios:hover,.radios.current:hover{
	border:2px solid #3B94C7;
	color:#3B94C7;
	background:#EEEEEE;
	position: relative;
}
.radios:hover{
	border-color: #D4D4D4;
}
.radios.current:before{
	content :'';
	width:0;
	height:0;
	position:absolute;
	left:-1px;
	top:-1px;
	border-left:10px solid #3B94C7;
	border-bottom:10px solid rgba(0,0,0,0);
	border-right:none;
}
.radios.current:after{
	content :'';
	width:0;
	height:0;
	position:absolute;
	right:0;
	bottom:0;
	border-right:4px solid #3B94C7;
	border-bottom:4px solid #3B94C7;
	border-left:4px solid rgba(0,0,0,0);
	border-top:4px solid rgba(0,0,0,0);
}


#box{
	float: left;
	margin-left: 200px;
	margin-top:100px;
}
#tipwapper{
	border:1px solid #EEEEEE;
	position: relative;
	width:100px;
	height: 100px;
}
#tip{
	display: inline-block;
	width:0;
	height: 0;
	border:50px solid #3B94C7;
	position: absolute;
}

textarea{
	width:350px;
	height: 150px;
	resize:none;
	border:2px solid #D4D4D4;
	padding:10px;
}
h1{
	color: #DD5500;
	font-family: "Microsoft Yahei"
}
	</style>
	<script id="jquery_183" type="text/javascript" class="library" src="/Public/js/jquery-1.7.1.min.js"></script>
</head>
<body>
<div id="container">
		<h1>通过CSS边框画三角形</h1>
		<div id="controller">
			<dl>
				<dt>左边框</dt>
				<dd class="radios radio1" data-id="1">透明边框</dd>
				<dd class="radios radio1" data-id="2">无边框</dd>
				<dd class="radios radio1 current" data-id="3">有边框</dd>
				<dd><input type="hidden" id="left" value="3"/></dd>
			</dl>
			<dl>
				<dt>上边框</dt>
				<dd class="radios radio2"  data-id="1">透明边框</dd>
				<dd class="radios radio2"  data-id="2">无边框</dd>
				<dd class="radios radio2 current"  data-id="3">有边框</dd>
				<dd><input type="hidden" id="top" value="3"/></dd>
			</dl>
			<dl>
				<dt>右边框</dt>
				<dd class="radios radio3"  data-id="1">透明边框</dd>
				<dd class="radios radio3"  data-id="2">无边框</dd>
				<dd class="radios radio3 current"  data-id="3">有边框</dd>
				<dd><input type="hidden" id="right" value="3"/></dd>
			</dl>
			<dl>
				<dt>下边框</dt>
				<dd class="radios radio4"  data-id="1">透明边框</dd>
				<dd class="radios radio4"  data-id="2">无边框</dd>
				<dd class="radios radio4 current"  data-id="3">有边框</dd>
				<dd><input type="hidden" id="bottom" value="3"/></dd>
			</dl>

			<textarea id="input" readonly>