標籤：content aar 元素 jquer UI head pre class baidu
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-type" content="text/html; charset=utf-8" />
<title></title>
<link rel="stylesheet" href="imooc.css" type="text/css">
<script src="http://libs.baidu.com/jquery/1.9.1/jquery.js"></script>
</head>
<body>
<h2>子選取器與後代選取器</h2>
<div class="left">
<div class="aaron">
<p>div下的第一個p元素</p>
</div>
<div class="aaron">
<p>div下的第一個p元素</p>
</div>
</div>
<div class="right">
<div class="imooc">
<article>
<p>div下的article下的p元素</p>
</article>
</div>
<div class="imooc">
<article>
<p>div下的article下的p元素</p>
</article>
</div>
</div>
<script type="text/javascript">
//子選取器
//$(‘div > p‘) 選擇所有div元素裡面的子項目P
?.css("border", "1px groove red");
</script>
<script type="text/javascript">
//後代選取器
//$(‘div p‘) 選擇所有div元素裡面的p元素
?.css("border", "1px groove red");
</script>
<h2>相鄰兄弟選取器與一般兄弟選取器</h2>
<div class="bottom">
<div>兄弟節點div, +~選取器不能向前選擇</div>
<span class="prev">選取器span元素</span>
<div>span後第一個兄弟節點div</div>
<div>兄弟節點div
<div class="small">子項目div</div>
</div>
<span>兄弟節點span,不可選</span>
<div>兄弟節點div</div>
</div>
<script type="text/javascript">
//相鄰兄弟選取器
//選取prev後面的第一個的div兄弟節點
?.css("border", "3px groove blue");
</script>
<script type="text/javascript">
//一般相鄰選取器
//選取prev後面的所有的div兄弟節點
?.css("border", "3px groove blue");
</script>
</body>
</html>
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