4.3jQuery的基本选择器 - 每日作业html

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<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>jQuery的基础选择器</title>
	<style type="text/css">
		.box1{
			width: 600px;
			height: 500px;
			margin:5px;
			padding: 5px;
			border: 1px solid red;
			
		}

		ul{
			padding: 0;
			margin:0;
			overflow: hidden;
		}
		 li{
		 	width: 40px;
		 	height: 40px;
		 	border-radius: 50%;
			float: left;
			list-style-type: none;
			background-color: blue;
			text-align: center;
			line-height: 40px;
		}
	</style>
</head>
<body>
	
	<div class="box1">	
		<h2>双色球第99999期开奖结果</h2>
	<ul>
		<li>01</li>
		<li>02</li>
		<li>03</li>
		<li>04</li>
		<li>05</li>
		<li>06</li>
		<li>07</li>
		<li>08</li>
		<li>09</li>
	</ul>
	<p><span>本期中一等奖：5注</span></p>
	<p><a href="">中奖结果查询</a></p>
	
	</div>
</body>
</html>
<script type="text/javascript"src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>
<script type="text/javascript">
	// 返回第一个元素设置背景绿色
	$('li:first').css('background-color','green')
		// 返回最后一个元素背景微白色
	$('li:last').css('background-color','white')
	// 制定第2个元素背景为浅蓝
	$('li:eq(1)').css('background-color','lightblue')
	// 设置P标签下的所有A标签前景色为红色
	$('p').children('a').css('color','red')
	// 回调函数，对每个ul元素设置
	$('ul').each(function(){
		$(this).css('color','red')
		$(this).css('font-size','1.2em')
	})
	 // 指定下一个元素背景色为天蓝
	$('li').eq(5).next().css('background-color','lightskyblue')
	// 设置第3个到底5个元素的背景色，其中最后一个元素不设置
	$('li').slice(2,5).css('background-color','pink')
	 // P标签中带‘一等奖’内容元素设置样式
	$('p:contains("一等奖")').css('font-size','2em')
</script>

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