div 二列和3列显示 _Web前端

div 2列和3列显示
<html>
<head><title>div2,3列显示</title>
<style type="text/css">
.bgk {
	width: 500px;
	border: 1px solid #FF0000;
}
.bgk li{
	float: left;
	position: relative;
	height: 50px;
	width: 50%;
}
</style>
<style type="text/css">
	#d1 span{ width:197px; height:18px; float:left; border:solid 1px blue;}
</style>
</head>
<body>

	<!-- 2列显示 -->
	<div class="bgk">
		<li>1</li>
		<li>2</li>
		<li>3</li>
		<li>4</li>
	</div>

	<p></p>
	<p></p>
	<p></p>

	<!-- 3列显示 -->
	<div style="width:600px; height:60" id="d1">
		<span>1</span>
		<span>1</span>
		<span>1</span>
		<span>1</span>
		<span>1</span>
		<span>1</span>
		<span>1</span>
		<span>1</span>
		<span>1</span>
	</div>
	
</body>
</html>