標籤：main doc 操作方法 button ext document 更改 *** btn
1. toggleClass() 對設定或移除被選元素的一個或多個類進行切換。個人理解：對所選元素做一個css樣式更改。
eg：
<html>
<head>
<script type="text/javascript" src="/jquery/jquery.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("button").click(function(){
$("p").toggleClass("main");
});
});
</script>
<style type="text/css">
.main
{
font-size:120%;
color:red;
}
</style>
</head>
<body>
<h1 id="h1">This is a heading</h1>
<p>This is a paragraph.</p>
<p>This is another paragraph.</p>
<button class="btn1">切換段落的 "main" 類</button>
</body>
</html>
jQuery 常見屬性操作方法 ******
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