<!doctype html>
<html>
<head>
<script src="http://code.jquery.com/jquery-1.4.2.min.js"></script>
</head>
<body>
<span>span1</span>
<div>
<button id="btn1">button1</button><br/>
<button id="btn2">button2</button><br/>
</div>
<div>
<label class="class1">label1</label><br/>
<label class="class2">label2</label><br/>
</div>
<span>span2</span>
</body>
</html>
<script>
//修改選擇對象的 color 樣式為 red
$("#btn2, .class1, span").css("color", "red");
</script>
