tryjquery_sel_header 在线代码实例

实例代码( Tip: 登录后体验更佳 )
运行代码

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<!DOCTYPE html>
<html>
<head>
<script src="//libs.baidu.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
  $(":header").css("background-color","yellow");
});
</script>
</head>
<body>
<h1>Welcome to My Homepage</h1>
<h2>My Fantastic Homepage</h2>
<h3>It's amazing!</h3>
<p class="intro">My name is Donald.</p>
<p>I live in Duckburg.</p>
<p>My best friend is Mickey.</p>
<p>Who is your favourite:</p>
<ul id="choose">
<li>Goofy</li>
<li>Mickey</li>
<li>Pluto</li>
</ul>
</body>
</html>
 
 
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运行结果
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