標籤：
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>className屬性</title>
<style>
body{ font-size:16px;}
.one{
border:1px solid #eee;
width:230px;
height:50px;
background:#ccc;
color:red;
}
.two{
border:1px solid #ccc;
width:230px;
height:50px;
background:#9CF;
color:blue;
}
</style>
</head>
<body>
<p id="p1" > JavaScript使網頁顯示動態效果並實現與使用者互動功能。</p>
<input type="button" value="添加樣式" onclick="add()"/>
<p id="p2" class="one">JavaScript使網頁顯示動態效果並實現與使用者互動功能。</p>
<input type="button" value="更改外觀" onclick="modify()"/>
<script type="text/javascript">
function add(){
var p1 = document.getElementById("p1");
p1.className="one";
}
function modify(){
var p2 = document.getElementById("p2");
p2.className="two";
}
</script>
</body>
</html>
擷取元素的class 屬性，為網頁內的某個元素指定一個css樣式來更改該元素的外觀，獲得 <p> 元素的 class 屬性和改變className
Start building with 50+ products and up to 12 months usage for Elastic Compute Service
1 on 1 presale consultation
24/7 Technical Support 6 Free Tickets per Quarter Faster Response
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.
A comprehensive suite of global cloud computing services to power your business
Payment Methods We Support
